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. CarsonThe broader problem is that a great deal of popular preaching and teaching uses the bible as a pegboard on which to hang a fair bit of Christianized pop psychology or moralizing encouragement, with very little effort to teach the faithful, from the Bible, the massive doctrines of historic confessional Christianity.
D. A. CarsonThe New Testament writers I think conceive of their inspired Scripture writings as flushing out, bringing to articulation, expounding and so on the climactic revelation in the son, but this in self-conscious fulfillment of the promises and covenants that were already made to God's chosen people in Old Testament times.
D. A. CarsonWhat the Bible says is what God has disclosed and we want to approach this sacred text with cognitive reverence.
D. A. CarsonPeople do not drift toward Holiness. Apart from grace-driven effort, people do not gravitate toward godliness, prayer, obedience to Scripture, faith, and delight in the Lord. We drift toward compromise and call it tolerance; we drift toward disobedience and call it freedom; we drift toward superstition and call it faith. We cherish the indiscipline of lost self-control and call it relaxation; we slouch toward prayerlessness and delude ourselves into thinking we have escaped legalism; we slide toward godlessness and convince ourselves we have been liberated.
D. A. Carson