1 John 4:1

Verse 1. Beloved, believe not every spirit.

Here a solemn injunction is laid upon the brethren to whom this epistle is addressed. We must first understand just what is exacted of us before we can comply with the injunction. What is it to believe but to have faith in? We are not to believe what? Every spirit is the answer. But spirits exhibit their presence by acts. Cain exhibited the spirit of a murderer. Hence it is that we must watch the exhibitions of those we come in contact with, and, until known to be good, we must not have faith in them. The apostle says, try the spirits, and the reason is given, making all things plain. False prophets have gone out in the world. These may make loud pretensions of piety. In them we must not place our faith until tried.