Don't believe a teaching just because you've heard it from a man who's supposed to be holy, or because it's contained in a book supposed to be holy, or because all your friends and neighbors believe it. But whatever you've observed and analyzed for yourself and found to be reasonable and good, then accept that and put it into practice.
By three things the wise person may be known. What three? He sees a shortcoming as it is. When he sees it, he tries to correct it. And when another acknowledges a shortcoming, the wise one forgives it as he should.
And for a disciple thus freed, in whose heart dwells peace, there is nothing to be added to what has been done, and naught more remains for him to do. Just as a rock of one solid mass remains unshaken by the wind, even so, neither forms, nor sounds, nor odors, nor tastes, nor contacts of any kind, neither the desired, nor the undesired, can cause such an one to waver. Steadfast is his mind, gained is deliverance.
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.
Offend in neither word nor deed. Eat with moderation. Live in your heart. Seek the highest consciousness. Master yourself according to the law. This is the simple teaching of the awakened.