The mentor can be identified by four things: by restraining you from wrongdoing, guiding you towards good actions, telling you what you ought to know, and showing you the path to heaven.
Gautama BuddhaAn pretend and evil friend is haughty to be feared than a unmanageable beast; a unmanageable beast may mouthful your build up, but an evil friend fortitude mouthful your intellect.
Gautama BuddhaBy whomsoever no evil is done in deed, or word, or thought, him I call a Brahmin (holy man) who is guarded in these three.
Gautama BuddhaTherefore, be islands unto yourselves. Be your own refuge. Have recourse to none else for refuge. Hold fast to the Dharma as a refuge. Resort to no other refuge. Whosoever, either now or after I am gone, shall be islands unto themselves, shall seek no eternal refuge, it is they, among my disciples who shall reach the very topmost height! But they must be keen to progress.
Gautama Buddha