St. Matthew 5:37 But let your communication be, Yea, yea; Nay, nay: for whatsoever is more than these cometh of evil.
We are to abide with the yes of God and the no God. He devil have his own yes and his own no just like he deceives Adam in the garden of Aden. The devil established is no to Eve in other to eat fruit and to her that she will not die when God has said she will die. We should not swear to someone for them to believe us. We let our yes be yes and our no be no.
Genesis 3:4 And the serpent said unto the woman, Ye shall not surely die:
We should be angry with the yes and no of the Devil. We should not let our angry go down on the yes and no of the Devil. We should stay away from his lie and deceit.
Ephesians 4:26 Be ye angry, and sin not: let not the sun go down upon your wrath:
Ephesians 4:27 Neither give place to the devil.