In the next verse (Matthew 5:18) Jesus goes on to say, “For truly I say to you, until heaven and earth pass away, not the smallest letter or stroke shall pass from the Law until all is accomplished.” He is emphasizing His previous statement by pointing out the permanence of the moral law of God. Not even the smallest letter (In Hebrew this is a “jot”) or even a fraction of a letter (a “stroke” or “tittle”) of the law of God will pass away until heaven and earth do! In putting it this way, Jesus is indicating that God’s law is more permanent than the universe! The Greek phrase “until all is accomplished” literally means “until all has come to pass.” It’s another way of emphasizing that God’s law will outlast human history.
Lisle, J. (2012). God’s Law: Established in Christ. Jason Lisle’s Blog. Available http://www.jasonlisle.com/2012/02/03/gods-law-established-in-christ/. Last accessed 2nd Aug 2014.