Et sane arduum debet esse, quod adeo raro reperitur. Qui enim posset fieri, si salus in promptu esset et sine magno labore reperiri posset, ut ab omn… - Benedictus de Spinoza

Philopon: The misfortune of this man has always touched me in an extraordinary way. He lived in moderation, alone and irreproachable; he renounced all human idols and devoted his entire life to reflection, and look what happened! In the labyrinth of his meditations, he goes astray and, out of error, maintains much that agrees very little with his innocent way of life and that the most depraved scoundrel might wish for in order to be able to indulge his evil desires with impunity. How unjust is the irreconcilable hatred of scholars towards someone so unfortunate!

Nothing in Nature is random. A thing appears random only through the incompleteness of our knowledge.

in the case of the given numbers 1, 2, 3, everybody can see that the fourth proportional is 6, and all the more clearly because we infer in one single intuition the fourth number from the ratio we see the first number bears to the second.