“To prevent his disciples from asking the time of his coming, Christ said: About that hour no one knows, neither the angels nor the Son. It is not for you to know times or moments. He has kept those things hidden so that we may keep watch..
Keep watch; when the body is asleep nature takes control of us, and what is done is not done by our will but by force, by the impulse of nature. When deep listlessness takes possession of the soul, for example, faint-heartedness or melancholy, the enemy overpowers it and makes it do what it does not will. The force of nature, the enemy of the soul, is in control.
When the Lord commanded us to be vigilant, he meant vigilance in both parts of man: in the body, against the tendency to sleep; in the soul, against lethargy and timidity. As Scripture says: Wake up, you just, and I have risen, and am still with you; and again, Do not lose heart. Therefore, having this ministry, we do not lose heart.