By the words “one iota or one point shall not pass from the Law,” we must understand only a strong metaphor of completeness, drawn from the letters of writing, iota being the least of the letters, made with one stroke of the pen, and a point being a slight dot at the end of the same letter. The words there shew that the Law shall be completed to the very least matter.
Reproduced in full. Translation: Oxford 1841 (Newman), public domain (Public domain).
Also cites: Serm. in Mont. i, 8