He who knows and feels the divine power in his inmost being will be set free in the most literal sense of the word from anxieties and cares. He who has not yet arrived at this stage but is on the way to it can approach the same desirable result by the intensity of his faith in that being. But such a one must really have the faith and not merely say so. The proof that he possesses it would lie in the measure with which he refuses to accept negative thoughts, fearful thoughts, despondent thoughts. In the measure that he does not fail in his faith and hence in his thinking, in that measure, the higher power will not fail to support him in his hour of need. This is why Jesus told his disciples, "Take no anxious thought for the morrow." In the case of the adept, having given up the ego, there is no one left to take care of him, so the higher Self does so for him. In the case of the believer, although he has not yet given up the ego, nevertheless, he is trying to do so, and his unfaltering trust in the higher Self is rewarded proportionately in the same way. In both cases the biblical phrase, "The Lord will provide," is not merely a pious hope but a practical fact.
-- Notebooks Category 20: What Is Philosophy? > Chapter 3: Its Requirements > # 97
-- Perspectives > Chapter 20: What Is Philosophy? > # 76