I have a very dear friend who is in the executive coaching business. He often uses the phrase that he is "helping good people do great things." As corny as that may sound, I think it is a worthwhile aspiration for a godly man.
A person's greatest accomplishment in life might just be helping others accomplish things. But conversely, a person's greatest failure in life could be that they prevented others from achieving greatness.
Are people better off because they know me? Does knowing me help their relationship with God? If so, then perhaps I am achieving a measure of greatness myself!