1 Corinthians 16:13 - Matthew Poole's English Annotations on the Holy Bible

Watch ye: watching, in its usual acceptation, signifieth a forbearing of sleep; and that in order to some end. Sin is set out under the notion of sleep, Ephesians 5:14; so that spiritual watching signifies a diligent abstaining from sin, and from whatsoever may be to us a temptation to sin against God, in order to the perfecting of holiness, and the obtaining life and immortality. Stand fast in the faith; be steady in the profession of the truth, and holding close to the doctrine of faith. Quit you like men, be strong; you are as soldiers fighting against the world, the flesh, and the devil; do not behave yourselves like children, whom the least opposition will terrify and throw down; but like men, with a spiritual courage and fortitude, becoming such who have so good a Captain, and so good a cause.