Beloved, do not believe every spirit, 
But test the spirits – if they are from God, 
Because many false prophets have gone out into the world.

By this you know the spirit of God:
every spirit which confesses Jesus Christ in the flesh has come from God. 

And every spirit which does not confess that Jesus is from God is not.

And this is the one from the Antichrist, which you have heard  that is coming,
and is already in the world.

Thank you, dear Jesus,
for all you have given me,
for all you have taken away from me,
for all you have left me.

Thomas More (c.1478-1535)