it is necessary to exercise faith continually

"Belief would be compelled, and God has no use for a mechanical obedience; He calls for that which is worked out in struggle against the natural desires of men. He has wrapped up His revelation in such a way that it is necessary to exercise faith continually; and faith is not attained except by this same struggle. We have continually to insist upon this fact because of that which would pull us down. We have to maintain a faith that looks past the immediate appearance and presses upwards as the tree towards the light."