IT'S ALL LATIN TO ME

This quote "dimidium facti qui coepit habet: sapere aude, incipe" in English says "who has begun has half done: dare to be wise, begin." Now I don't know what that means even when I read it in English. when I searched it online I saw another translation which said "it's as if we have forgotten the causality of fate that has brought down every great civilization." That still doesn't really make sense to me, but I hope we can talk more about it tomorrow.