"God is the only one we can surrender to without losing ourselves. In fact, we find our deepest, truest, and most loving self in God. Yet it is still a paradox. I am increasingly convinced that all true spirituality has the character of paradox to it, precisely because it is always holding together the Whole of Reality, which is always “everything.” Everything in this world is both attractive and non-attractive, light and darkness, passing and eternal, life and death—at the same time. Don’t just accept my statement here, but think about this philosophically, physically, biologically, or scientifically. Everything has different sides, levels, truths, perspectives, and potential problems that it carries along with it.
A paradox is something that appears to be a contradiction, but from another perspective is not a contradiction at all. You and I are living paradoxes, and therefore most prepared to see ourselves in all outer reality. If you can hold and forgive the contradictions within yourself, you can normally do it everywhere else, too. If you cannot do it in yourself, you will actually create, project, and revel in dichotomies everywhere else."
~ Richard Rohr.
Two good books on "paradox" that I've foind useful are: The Promise of Paradox: A Celebration of Contradictions in the Christian Life by Parker Palmer; and The Way of Paradox: Spiritual Life as Taught by Meister Eckhart by Cyprian Smith OSB