The important thing, Jesus is saying (in Matthew 5:33-37), is to tell the truth and keep one's pledges without insisting that a certain form of words must be used if it is to be binding. No oath is necessary for the truthful person... Their word is so reliable that nothing more than a statement is needed from them.
D. A. CarsonWrath, unlike love, is not one of the intrinsic perfections of God. Rather, it is a function of God's holiness against sin. Where there is no sin, there is no wrath-but there will always be love in God. Where God in His holiness confronts His image-bearers in their rebellion, there must be wrath, or God is not the jealous God He claims to be, and His holiness is impugned. The price of diluting God's wrath is diminishing God's holiness.
D. A. CarsonDamn all false antitheses to hell, for they generate false gods, they perpetuate idols, they twist and distort our souls, they launch the church into violent pendulum swings who oscillations succeed only in dividing brothers and sisters in Christ
D. A. CarsonThe Christian's whole desire, at its best and highest, is that Jesus Christ be praised. It is always a wretched bastardization of our goals when we want to win glory for ourselves instead of for him.
D. A. CarsonWhen you are converted, you want to do what you didn't want to do before, and you don't want to do what you wanted to do before. There's a change in the heart; there's a cleaning up, a change in orientation, and holiness becomes attractive, instead of something you have to put up with to figure out what you can get away with. As long as young people are asking, 'Can I get away with this?' or 'Can I get away with that?' I wonder if they're regenerate. If they're asking, instead, 'How can I grow in holiness?' then I suspect they've begun to understand.
D. A. Carson