Neither shalt thou swear by thy head, because thou canst not make one hair white or black. Neither shalt thou swear by thy head - For these plain reasons:
1st. God commands thee not to do it.
2dly. Thou hast nothing which is thy own, and thou shouldst not pledge another's property.
3dly. It never did, and never can, answer any good purpose. And
4thly. Being a breach of the law of God, it is the way to everlasting misery.