There is always strength in looking to God; but if the mind rests upon the weakness otherwise than to cast it upon God, it becomes unbelief. Difficulties may arise; God may allow many things to come in to prove our weakness; but the simple path of faith is to go on, not looking beforehand at what we have to do, but reckoning upon the help that we shall need and find when the time arrives. It was no matter to David whether it was the lion, the bear, or Goliath; it was all one to him, for in himself he was as weak in the presence of one as in that of the other; but he went on quietly doing his duty, taking it for granted that God would be with him. This is faith.