New Defender's Study Bible Notes
5:18 one jot or one tittle. The “jot” and “tittle” were the smallest letter and a mark which distinguished two letters in the Hebrew words of the Old Testament. Thus, not only the words, but even the letters are divinely inspired, in the original autographs of the Scriptures.
5:19 least in the kingdom. We “in the kingdom” are held accountable (especially when we teach others), for believing and obeying all God’s commands. There are no insignificant or non-inspired statements in the Bible.