A believer considers that both difficulties and ease come from God. Therefore, he turns towards God in good times and in bad. When in comfortable circumstances, he thanks God, and in adverse circumstances, he exercises patience. As opposed to this, one who denies the truth solely relies upon himself. So, when in easy circumstances, he is boastful. When his energies fail him, he is desperate, because he feels that he has reached the final limit. This is nature’s indication that the former type of mentality is the truly virtuous one, while the latter is improper and unworthy. One sign of a believer is that he spends his wealth for the pleasure of God. So, he shares his wealth with other needy persons who may or may not be his relatives. He spends his wealth to reap the benefits of the Hereafter and not to earn profits in this world like a usurer. A man’s creation, his being provided with the necessities of life day and night, his meeting death—all these events are so great that a universal power is required to bring them about. And no Being except the Creator of the Universe possesses such Universal powers. The fact is that the principle of the Oneness of God (monotheism) is its own proof and polytheism is its own contradiction.