diff --git a/lib/cli/etcher.js b/lib/cli/etcher.js
index 09582580..735ace29 100644
--- a/lib/cli/etcher.js
+++ b/lib/cli/etcher.js
@@ -26,11 +26,12 @@ const writer = require('./writer');
 const errors = require('./errors');
 const options = require('./cli');
 const robot = require('../shared/robot');
+const messages = require('../shared/messages');
 const EXIT_CODES = require('../shared/exit-codes');
 
 isElevated().then((elevated) => {
   if (!elevated) {
-    throw new Error('This should should be run with root/administrator permissions');
+    throw new Error(messages.error.elevationRequired());
   }
 
   return form.run([
@@ -102,7 +103,7 @@ isElevated().then((elevated) => {
       });
     }
 
-    console.log('Your flash is complete!');
+    console.log(messages.info.flashComplete());
 
     if (results.sourceChecksum) {
       console.log(`Checksum: ${results.sourceChecksum}`);
diff --git a/lib/gui/app.js b/lib/gui/app.js
index e0cd15f2..5dd097d7 100644
--- a/lib/gui/app.js
+++ b/lib/gui/app.js
@@ -25,6 +25,7 @@
 var angular = require('angular');
 const electron = require('electron');
 const EXIT_CODES = require('../shared/exit-codes');
+const messages = require('../shared/messages');
 
 /* eslint-enable no-var */
 
@@ -168,11 +169,7 @@ app.run(($window, WarningModalService, ErrorService, FlashStateModel) => {
     WarningModalService.display({
       confirmationLabel: 'Yes, quit',
       rejectionLabel: 'Cancel',
-      description: [
-        'You are currently flashing a drive. Closing Etcher may leave',
-        'your drive in an unusable state.\n\nAre you sure you want to',
-        'close Etcher?'
-      ].join(' ')
+      description: messages.warning.exitWhileFlashing()
     }).then((confirmed) => {
       if (confirmed) {
 
diff --git a/lib/gui/components/drive-selector/controllers/drive-selector.js b/lib/gui/components/drive-selector/controllers/drive-selector.js
index 604f4fe4..ab70727a 100644
--- a/lib/gui/components/drive-selector/controllers/drive-selector.js
+++ b/lib/gui/components/drive-selector/controllers/drive-selector.js
@@ -17,6 +17,7 @@
 'use strict';
 
 const _ = require('lodash');
+const messages = require('../../../../shared/messages');
 
 module.exports = function(
   $q,
@@ -79,8 +80,10 @@ module.exports = function(
     return WarningModalService.display({
       confirmationLabel: 'Yes, continue',
       description: [
-        `This image recommends a ${SelectionStateModel.getImageRecommendedDriveSize()}`,
-        `bytes drive, however ${drive.device} is only ${drive.size} bytes.`,
+        messages.warning.unrecommendedDriveSize({
+          image: SelectionStateModel.getImage(),
+          drive: drive
+        }),
         'Are you sure you want to continue?'
       ].join(' ')
     });
diff --git a/lib/gui/pages/main/controllers/flash.js b/lib/gui/pages/main/controllers/flash.js
index 9e33dad2..b3198f48 100644
--- a/lib/gui/pages/main/controllers/flash.js
+++ b/lib/gui/pages/main/controllers/flash.js
@@ -16,6 +16,8 @@
 
 'use strict';
 
+const messages = require('../../../../shared/messages');
+
 module.exports = function(
   $state,
   FlashStateModel,
@@ -65,20 +67,20 @@ module.exports = function(
         return;
       }
 
-      OSNotificationService.send('Success!', 'Your flash is complete');
+      OSNotificationService.send('Success!', messages.info.flashComplete());
       AnalyticsService.logEvent('Done');
       $state.go('success');
     })
     .catch((error) => {
-      OSNotificationService.send('Oops!', 'Looks like your flash has failed');
+      OSNotificationService.send('Oops!', messages.error.flashFailure());
 
       if (error.code === 'EVALIDATION') {
-        FlashErrorModalService.show('Your removable drive may be corrupted. Try inserting a different one and try again.');
+        FlashErrorModalService.show(messages.error.validation());
         AnalyticsService.logEvent('Validation error');
       } else if (error.code === 'ENOSPC') {
-        FlashErrorModalService.show('Not enough space on the drive. Please insert larger one and try again.');
+        FlashErrorModalService.show(messages.error.notEnoughSpaceInDrive());
       } else {
-        FlashErrorModalService.show('Oops, seems something went wrong.');
+        FlashErrorModalService.show(messages.error.genericFlashError());
         ErrorService.reportException(error);
         AnalyticsService.logEvent('Flash error');
       }
diff --git a/lib/gui/pages/main/controllers/image-selection.js b/lib/gui/pages/main/controllers/image-selection.js
index cd3bdba8..de63e8e3 100644
--- a/lib/gui/pages/main/controllers/image-selection.js
+++ b/lib/gui/pages/main/controllers/image-selection.js
@@ -17,6 +17,7 @@
 'use strict';
 
 const _ = require('lodash');
+const messages = require('../../../../shared/messages');
 
 module.exports = function(SupportedFormatsModel, SelectionStateModel, AnalyticsService, ErrorService, OSDialogService) {
 
@@ -56,7 +57,10 @@ module.exports = function(SupportedFormatsModel, SelectionStateModel, AnalyticsS
    */
   this.selectImage = (image) => {
     if (!SupportedFormatsModel.isSupportedImage(image.path)) {
-      OSDialogService.showError('Invalid image', `${image.path} is not a supported image type.`);
+      OSDialogService.showError('Invalid image', messages.error.invalidImage({
+        image: image
+      }));
+
       AnalyticsService.logEvent('Invalid image', image);
       return;
     }
diff --git a/lib/shared/messages.js b/lib/shared/messages.js
new file mode 100644
index 00000000..778c4e4a
--- /dev/null
+++ b/lib/shared/messages.js
@@ -0,0 +1,86 @@
+/*
+ * Copyright 2016 resin.io
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+'use strict';
+
+const _ = require('lodash');
+
+/**
+ * @summary Application messages
+ * @namespace messages
+ * @public
+ */
+module.exports = {
+
+  /**
+   * @summary Informational messages
+   * @namespace info
+   * @memberof messages
+   */
+  info: {
+
+    flashComplete: _.template('Your flash is complete!')
+
+  },
+
+  /**
+   * @summary Warning messages
+   * @namespace warning
+   * @memberof messages
+   */
+  warning: {
+
+    unrecommendedDriveSize: _.template([
+      'This image recommends a <%= image.recommendedDriveSize %>',
+      'bytes drive, however <%= drive.device %> is only <%= drive.size %> bytes.'
+    ].join(' ')),
+
+    exitWhileFlashing: _.template([
+      'You are currently flashing a drive. Closing Etcher may leave',
+      'your drive in an unusable state.\n\n',
+      'Are you sure you want to close Etcher?'
+    ].join(' '))
+
+  },
+
+  /**
+   * @summary Error messages
+   * @namespace error
+   * @memberof messages
+   */
+  error: {
+
+    notEnoughSpaceInDrive: _.template([
+      'Not enough space on the drive.',
+      'Please insert larger one and try again.'
+    ].join(' ')),
+
+    genericFlashError: _.template('Oops, seems something went wrong.'),
+
+    validation: _.template([
+      'Your removable drive may be corrupted.',
+      'Try inserting a different one and try again.'
+    ].join(' ')),
+
+    invalidImage: _.template('<%= image.path %> is not a supported image type.'),
+
+    elevationRequired: _.template('This should should be run with root/administrator permissions.'),
+
+    flashFailure: _.template('Looks like your flash has failed!')
+
+  }
+
+};
diff --git a/tests/shared/messages.spec.js b/tests/shared/messages.spec.js
new file mode 100644
index 00000000..8b254a28
--- /dev/null
+++ b/tests/shared/messages.spec.js
@@ -0,0 +1,35 @@
+/*
+ * Copyright 2016 resin.io
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+'use strict';
+
+const m = require('mochainon');
+const _ = require('lodash');
+const messages = require('../../lib/shared/messages');
+
+describe('Shared: Messages', function() {
+
+  it('should contain object properties', function() {
+    m.chai.expect(_.every(_.map(messages, _.isPlainObject))).to.be.true;
+  });
+
+  it('should contain function properties in each category', function() {
+    _.each(messages, (category) => {
+      m.chai.expect(_.every(_.map(category, _.isFunction))).to.be.true;
+    });
+  });
+
+});