Do not believe in anything simply because you have heard it. But after observation and analysis, when you find that anything agrees with reason and is conducive to the good and benefit of one and all, then accept it and live up to it.
Imagine that every person in the world is enlightened but you. They are all your teachers, each doing just the right things to help you learn perfect patience, perfect wisdom, perfect compassion.
One is not a great one because one defeats or harms other living beings. One is so called because one refrains from defeating or harming other living beings.
Find out for yourself what is truth, what is real. Discover that there are virtuous things and there are non-virtuous things. Once you have discovered for yourself give up the bad and embrace the good.
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.