For truly, I say to you, until heaven and earth pass away, not an iota, not a dot, will pass from the Law until all is accomplished.
18. Till heaven and earth pass Luke expresses it a little differently, but to the same import, that it is easier for heaven and earth to pass, than for one point of the law to fail The design of Christ, in both passages, was to teach, that the truth of the law and of every part of it, is secure, and that nothing so durable...
Those to whom Christ preached, and for whose use he gave these instructions to his disciples, were such as in their religion had an eye, 1. To the scriptures of the Old Testament as their rule, and therein Christ here shows them they were in the right: 2. To the scribes and the Pharisees as their example, and therein Christ here shows them they were in the wrong; for, I.
Commenting on Matthew 5:17-20
For verily I say unto you,.... Or "I Amen say unto you", which is one of the names of Christ; see Rev 3:14 or the word "Amen" is only used by Christ as an asseveration of what he was about to say; and which, for greater confirmation, is usually doubled in the Evangelist John, "Amen, Amen", or "verily, verily".