Wherefore He saith, Awake thou that sleepest, and arise from the dead, and Christ shall give thee light. – Ephesians 5:14

“How can I be kept awake?” No one can give you spiritual power and watchfulness but the Spirit of God. “All my fresh springs are in Thee.” Where life first comes from, there more life must be obtained. Christ has come that we may have life, and that we may have it more abundantly. He who first called us from the dead, must also arouse us from among the slumbering. He who brought us from the grave of our depravity must bring us from the couch of our indolence. Pray about the matter; make it a point with God: ask Him to arouse you. On your knees is the posture in which to conquer sloth.

Act towards yourselves about spiritual wakefulness as you would with natural wakefulness. Set your inventive faculties to work, and devise means for chasing away the sleep dragon. What would you do if you required to be awakened early? Perhaps you would set an alarum; a good thing, no doubt. Take care you set a spiritual alarum. Every Christian ought to keep one, and it should be so well set as to keep exact time, and so powerful as to arouse the most slumbering. A tender conscience, quick as the apple of the eye, is a precious preservative against sinful sleep; but it must never be tampered with, or its usefulness will soon end. When once the hour has come, down runs the alarum, the man starts up all at once, and says, “It is time to rise;” so should my conscience be so well regulated, that when a temptation is near, or a sinner is near me whom I ought about warn, my soul should at once take the alarum and say, “Here is work to do-a sin to be conquered, or a soul to be instructed: now, therefore, perform the doing of it with all thy might! I hear the alarum, and I must bestir myself!” May we always maintain and retain such a special wakefulness that we may be at our post of duty or in our place of conflict with a punctuality which none can gainsay. O for the alarum of a tender conscience! ~ C.H. Spurgeon

https://www.blueletterbible.org/Comm/spurgeon_charles/sermons/0996.cfm