Your Inspiration

What book, person, thing have influenced the most in your life?

I am reading some topics on Sri Bhagvat Gita recently and found the list of famous people who were inspired by its readings including Gandhi and many others.

I truly believe in Gita that says in brief, " One should not keep his interests on the fruition of deeds but rather on the tranquility produced in the mind by pusuing the deed itself."