Miley CyrusShe’s been diligently keeping up with her fitness routine, and Miley Cyrus was back out on Thursday (March 29) for a Winsor Pilates class in Los Angeles, California.

The sporty 19-year-old was clad in an all-black ensemble as she grabbed up a post-Pilates smoothie before cruising away from the Melrose Ave. gym locale.

After having taken a break from social networking, Miss Cyrus is back to tweeting in full force – as she took to Twitter during the course of the day to offer up some words of wisdom.

The former Disney darling first posted a message reading, “If you take your happiness and put it in someone’s hands, sooner or later, they will break it.”

Further explaining the tweeted statement, Miley added a short while later, “Happiness can only come from inside of you & is the result of your love for yourself. You are responsible for your happiness.”

On the career front, recent reports tell that Cyrus is working with Paramount Pictures on a Christian-based film about “a young woman’s broken promise to God.”

A source told, “There was a meeting for the film three weeks ago, a table reading two weeks ago and they’ve been working on the scripts for the film since the March 18, 2012.”