How show content that is locked to unregistered users

I have a website with a block of text available only for registers users. The structure is something like this:

-Title available for all users
-Text available only for registered users and panel alert to notify unregistered users

Here is a screenshot of what I have now:

I am not sure if this way of show locked content is good, or just the panel alert is enough. Any study or opinion about this subject?