Our life is truly Combat, a mortal fight until the end. Our enemies are many, but especially three: the devil, the flesh and the world. This short essay has as its purpose to help us beware of the many tricks, lies, disguises, and traps of the devil, who is a liar and murderer from the beginning. With this self-knowledge and awareness, we can fight the good fight, run the good race, and eventually win the merited crown in Heaven that awaits God’s victorious soldiers.