Justin Bieber doing some thinking with 'As a Man Thinketh'

It seems like Justin Bieber is thinking a lot these days, as the singer was recently spotted clutching James Allen's 'As a Man Thinketh.'

The 20-year-old pop singer was in Beverly Hills Friday holding the 1902 published literary essay, that makes one ponder on one's own thoughts and how it effects their lives, TMZ.com reported.

It is considered as a helpful personal development tool by the readers.