Constantly stopping to explain oneself may expand into a frustrating burden for the rare individual, so ceasing to do so is like finally dropping the weights and sprinting towards his goals. Those who insincerely misunderstand, who intentionally distort the motives of a pure-intentioned individual, then, no longer have the opportunity to block his path; instead, they are the ones left to stand on the sidelines shouting frustratedly in the wind of his trail.
When your only regret is if anyone thinks you regret anything - that is the definition of conviction.
I often ask myself, 'Who would Jesus vote for?' Then I start to think that he wouldn't vote at all; however, it would not be out of apathy or disinterest, but out of perfection and light. As a miracle worker, I think he would, by the power of God's teachings, the perseverance and the truth, influence in a modern sense whoever is put into office how to best serve his fellow men. One, like his skeptics, may find that impractical. But there is a message in that no man in power can slow the momentum of the will of God, and the miracles of his teachings will be forever victorious.
It can be a good thing if deeper theology, or philosophy, only makes one more uncertain. It may lead to a healthy doubt; he may throw his hands up saying, 'God, I just don't know anymore. If you're out there, I'm giving it all to you.' From there, after the surrender, he is allowing God himself, rather than theories, books, and documents, to take over and lead him into all truth.