First, I noticed that the strong certainty people generally give to these proofs comes from the fact that they are clearly understood according to the principles I had already established.
https://github.com/davepinch/pinchy.cc/blob/master/content/topics/works/r/rene-descartes/discourse-on-the-method/translation/part-4/4-5-2.translation.md
And, in the first place, I observed, that the great certitude which by common consent is accorded to these demonstrations, is founded solely upon this, that they are clearly conceived in accordance with the rules I have already laid down.