"Do not say of anything 'I shall be sure to do so and so tomorrow' without adding 'If God wills!' And call your Sustainer to mind when you forget, and say: "I hope that my Lord will guide me ever closer even than this to the right path.' ” (Surah al-Kahf 18: 23-24)
"We must never rely upon our own resources so much as to forget God. If by any chance we do forget, we must come back to Him and keep Him in remembrance. In our life there is always the hope of drawing closer and closer to God. (A. Yusuf Ali)"