Our relationship with each other is the criterion the world uses to judge whether our message is truthful - Christian community is the final apologetic.
No totalitarian authority nor authoritarian state can tolerate those who have an absolute by which to judge that state and its actions. The Christians had that absolute in God's revelation.
If there is no absolute by which to judge society, society is absolute.
If there is no absolute beyond man's ideas, then there is no final appeal to judge between individuals and groups whose moral judgments conflict. We are merely left with conflicting opinions.
If you want a significant man, with absolutes, morality, and meaning, then you must have what the Bible insists upon - that God will judge men justly, and they will not be able to raise their voices because of the base upon which He judges them.