I say to you, Swear not at all

"But I say to you, Swear not at all; neither by heaven; for it is God's throne: Nor by the earth; for it is his footstool: neither by Jerusalem; for it is the city of the great King. Neither shall you swear by your head, because you can not make one hair white or black. But let your communication be, Yes, yes; No, no: for whatever is more than these comes of evil." -Matthew 5:34-37 (AKJV)