Who explains the relationship between faith and reason better than Heschel?
“Reality is not exhausted by knowledge. Inaccessible to research are the ultimate facts. All scientific conclusions are based on axioms, all reasoning depends ultimately upon faith. Faith is virgin thinking, preceding all transcendent knowledge. To believe is to abide at the extremities of spirit.”
“There is neither advance nor service without faith. Nobody can rationally explain why he should sacrifice his life and his happiness for the sake of the good.
The conviction that I must obey the ethical imperatives is not derived from logical argument but originates from an intuitive certitude, in a certitude of faith.
There is no conspiracy against reason, no random obstinacy, no sluggish inertia of mind or smug self-assurance entrenched behind the walls of believing.
Faith does not detach a man from thinking, it does not suspend reason. It is opposed not to knowledge but to backwardness and dullness, to indifferent aloofness to the essence of living. … It is a distortion to regard reason and faith as alternatives.
Reason is a necessary coefficient of faith. Faith without explication by reason is mute, reason without faith is deaf. There can be a true symbiosis of reason and faith.”
“The Holy Dimension”, p. 338 – http://en.wikiquote.org/wiki/Abraham_Joshua_Heschel