Naturæ a mente principium ducunt, mens est potior pars earum, e mente constant; si (quis) mente inquinata aut loquitur aut agit, tum eum sequitur dolor, ut rota (bovis) vehentis pedem.
Naturæ a mente etc.; si (quis) mente serena aut loquitur aut agit, tum eum sequitur gaudium ut umbra non decedens.
I had to type it all by hand, and it made old memories from my Latin lessons at school come up. I never liked Latin and dropped it as soon as this was possible, but still some memories came back now.
My 86 year old dad then helped me with proofreading: He would read out the pdf loud for me so that I could compare with what I had typed and find all my typos. He had learned Latin for much longer time than I had, and he said he felt still pretty much able to translate a text like this.