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" During the return march to Medina after the victories of Mecca and Hunayn the Prophet said to some of his Companions: “We have returned from the Lesser Holy War to the Greater Holy War.” And when one of them asked: “What is the Greater Holy War, O Messenger of God?” he answered: “The war against the soul.” The soul of fallen man is divided against itself. Of its lowest aspect the Koran says: ‘Verily the soul commandeth unto evil.’ The better part of it, that is the conscience, is named the ‘ever-upbraiding soul’; and it is this which wages the Greater Holy War, with the help of the spirit, against the lower soul.
Finally there is ‘the soul which is at peace,’ that is the whole soul no longer divided against itself, after the battle has been won. Such are the souls of those who have reached the highest degree, at the level of ‘the foremost, the slaves of God, the near. "
― , Muhammad: His Life Based on the Earliest Sources
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" A’ishah was at that time in her sixteenth year, old for her age in some respects but not in others. Her feelings were always clear from her face, and nearly always from her tongue. On one occasion the Prophet said to her: “O ‘A’ishah, it is not hidden from me when thou art angered against me, nor yet when thou art pleased.” “O dearer than my father and my mother,” she said, “how knowest thou that?” “When thou art pleased,” he said, “thou sayest in swearing ‘Nay, by the Lord of Muhammad’, but when thou art angered it is ‘Nay, by the Lord of Abraham’. "
― , Muhammad: His Life Based on the Earliest Sources