For verily I say unto you, Till heaven and earth pass away, one jot or one tittle shall in no wise pass from the law, till all be fulfilled.
All Commentaries on Matthew 5:18 Go To Matthew 5
John Chrysostom
AD 407
Now what He says is like this: it cannot be that it should remain unaccomplished, but the very least thing therein must needs be fulfilled. Which thing He Himself performed, in that He completed it with all exactness.
And here He signifies to us obscurely that the fashion of the whole world is also being changed. Nor did He set it down without purpose, but in order to arouse the hearer, and indicate, that He was with just cause introducing another discipline; if at least the very works of the creation are all to be transformed, and mankind is to be called to another country, and to a higher way of practising how to live.
