We are all fallible observers of the world, our place in it, our influence on it, and of others. Some days it seems that from that there are two conflicting conclusions:

Trust no one, including ourselves.
Trust everyone, including ourselves.

Perhaps a good life emerges in the reconciliation of the two. Understanding that everything we do is wrong by some measure, but finding the courage to act anyway, balanced by the humility to admit fault when we err, and the compassion to forgive when others do likewise.