Our minds and bodies require sleep on a regular basis. We can become weary from physical exertion or mental exertion. Illness can add to our need for sleep. Normally we sleep at routine times, but the pressure that tires us may not be so routine and can come at a time we would not expect. The disciples were under great pressure on the night when Jesus needed them most—and they slept (Matthew 26:40-41 Matthew 26:40-41  And he comes to the disciples, and finds them asleep, and said to Peter, What, could you not watch with me one hour?
 Watch and pray, that you enter not into temptation: the spirit indeed is willing, but the flesh is weak.
American King James Version×).
We all know how happy we are when we are so weary we can hardly function, and just slip into bed (Ecclesiastes 5:12 Ecclesiastes 5:12The sleep of a laboring man is sweet, whether he eat little or much: but the abundance of the rich will not suffer him to sleep.
American King James Version×). That is the sleep of a laboring man, but if there are deep concerns as a worried man may have, there never seems to be the right time to sleep. Sleep is so important that we need to take steps to ensure that we are not deprived of it for long. We may have sleepless nights from time to time, but with care, wisdom and thought, we can make those nights rare (Proverbs 3:21-26 Proverbs 3:21-26  My son, let not them depart from your eyes: keep sound wisdom and discretion:  So shall they be life to your soul, and grace to your neck.  Then shall you walk in your way safely, and your foot shall not stumble.  When you lie down, you shall not be afraid: yes, you shall lie down, and your sleep shall be sweet.  Be not afraid of sudden fear, neither of the desolation of the wicked, when it comes.  For the LORD shall be your confidence, and shall keep your foot from being taken.
American King James Version×). Work on good habits for living—they make for a much happier and contented life.