Surah 84. Al-Inshiqaq, Ayah 18

Thus God "calls to witness" the fact that nothing in His creation is ever at a standstill, since everything moves unceasingly from one state of being into another, at every moment changing its aspect and its condition: a phenomenon aptly described by the Greek philosopher Heraclitus by the phrase panta rhei ("everything is in flux").

(3) The astronomical Full Moon does not last a moment. The moment the moon is full, she begins to decline, and the moment she is in her "inter-lunar swoon", she begins her career anew as a growing New Moon. So is man's life here below. It is not fixed or permanent, either in its physical phases, or even more strikingly, in its finer phases, intellectual, emotional, or spiritual.