The word means trickery, cunning, cleverness shrewdness, evil design. It means a man who will do anything and use any means to get what he wants. Note that the minister is not to walk- this way, he is not to walk using and misusing people, circumstances events, and things for his own end. The minister of God is to walk as Jesus walked. I say then, Walk in the Spirit, and ye shall not fulfil the lust of the flesh.
Failure is Disastrous.
Salvation is not just some kind of religious fad. Our enemy is supernatural. He is the god of this world and he has blinded the minds of those who do not believe. If Satan can get a person to focus his life upon himself and the world, the person will become enslaved to his flesh and the things of this world. Humility must be a Reality.