We become what we contemplate. By constant thought an ideal gets imprinted on our hearts. When we fix our thoughts all the time of the evil that others do, our mind gets polluted by evil. On the contrary, if we fix our mind on the virtues or well-being of the others, our mind is cleansed of wrong and entertains only good thoughts. No evil thought can penetrate the mind of a person wholly given to love and compassion.

-Divine Discourse, March 7, 1978.

 I have a definition of a devotee that I expect. 
Those devoted to Me have to treat joy and grief, gain and loss with equal fortitude. - Baba