“In order that no advantage be taken of us by Satan, for we are not ignorant of his devices.” (2 Corinthians 2:11)
First, Satan is a liar and a murderer (John 8:44). He is a fallen angel who was banished to earth (Revelation 12:9). He is one angry being (Revelation 12:12) since he knows that after his days here are ended, he goes straight into the lake of fire (Revelation 20:10).
Keep that in mind.
You don’t want to trust that fellow. He is without the faintest hope of any future, big-time angry at God, and a liar of the first order. That’s a terrible combination. Don’t ever go into partnership with someone like that.
Trust nothing he says. Accept no promises from this liar.
However, he’s smart. Giving the devil his due, Martin Luther said of him, “On earth is not his equal.” You and I are no match for him by ourselves.