He who sees a pot, can know clearly that it is a pot, all by himself, is it not? Such being the case, how is it that one identifies oneself with the body, just because attachment makes one feel that it is one's own? This attachment is called ajnana, or the 'Myness'.  The Atman (spirit) is Formless and free from all mutations. It has no desires, impulses or intentions. It is free from all attachments. Hence, the afflictions of the world (thaapathraya) does not affect it. It always realizes that it is not the doer, and remains as a witness, just as the lotus thrives on the water, unaffected and unattached.

-Divine Discourse, Prasanthi Vahini. 

Bear calumny, loss, disappointment, defeat, boldly and with equanimity. 
Then, no mental depression can overwhelm you. - Baba