Do not be the kind of person who speaks much and claims to know everything. But rather, listen much, and when you do speak; do so with true understanding and humbleness. It is not true wisdom to insert your opinion on every matter, or try to take charge of every circumstance. Sometimes the greatest thing you can do is hold your tongue and just let the other person be wrong if that is what he chooses to do. This is far better than scattering many words with arrogance only to find out that your sliver of truth was not the entirety of the matter either.