Show messages on lock screen I'm looking for some sort of way that will show part/all of my text messages, emails, tweets on the screen when the phone is locked.

I just gave up my iPhone and this is something I'm really missing.  

To me it is annoying to have to click on a message just to see if the person responded "ok" or something that could easily be displayed on the screen.  

Here is a screen shot of the messaging.  I want to be able to read the text.
The S4 does have this option. Open the SMS app (Messaging) and go to Settings (using the drawer button on the bottom left of your phone). Within Settings, scroll down to notification settings and check the "notifications" box and the "preview message" box.

Note that to see the notification option in Settings you must access settings from the main screen of the Messaging app, not from within a conversation within Messaging. This is one of those apps that has different menus for "settings" depending on which screen you're currently viewing.