Wakefulness
Wakefulness is a daily recurring brainstate and state of consciousness in which an individual is conscious and engages in coherent cognitive and behavioral responses to the external world such as communication, ambulation, eating, and sex. Being awake is the opposite of the state of being asleep in which most external inputs to the brain are excluded from neural processing.
Effects upon the brain
The longer the brain has been awake, the greater the spontaneous firing rates of cerebral cortex neurons with this increase being reversed by sleep.[1]Another effect of wakefulness (which may or may not be related to this) is that it lowers the small stores of glycogen held in the astrocytes that can supply energy to the brain's neurons—one of the functions of sleep, it has been proposed, is to create the opportunity for them to be replenished
“Learn from the story of the fig tree. When its branch becomes tender and it sprouts leaves, you know summer is near. In the same way, when you see these things happen, you know that he is near, at the door. “I can guarantee this truth: This generation will not disappear until all these things take place. The earth and the heavens will disappear, but my words will never disappear. “No one knows when that day or hour will come. Even the angels in heaven and the Son don’t know. Only the Father knows. Be careful! Watch! You don’t know the exact time. It is like a man who went on a trip. As he left home, he put his servants in charge. He assigned work to each one and ordered the guard to be alert. Therefore, be alert, because you don’t know when the owner of the house will return. It could be in the evening or at midnight or at dawn or in the morning. Make sure he doesn’t come suddenly and find you asleep. I’m telling everyone what I’m telling you: ‘Be alert!’ ” (Mark 13:28-37 GW)
Let us not be found asleep at the guard post. Awaken us lord.