Io parlo per ver dire, non per odio d'altrui, né per disprezzo. - Petrarch

And what is the use of knowing many things if, when you have learned the dimensions of heaven and earth, the measure of the seas, the courses of stars, the virtues of plants and stones, the secrets of nature, you still don’t know yourself?

I closed the book*, angry with myself that I should still be admiring earthly things who might long ago have learned from even the pagan philosophers that nothing is wonderful but the soul, which, when great itself, finds nothing great outside itself. Then, in truth, I was satisfied that I had seen enough of the mountain; I turned my inward eye upon myself, and from that time not a syllable fell from my lips until we reached the bottom again... [W]e look about us for what is to be found only within... How many times, think you, did I turn back that day, to glance at the summit of the mountain which seemed scarcely a cubit high compared with the range of human contemplation.

* Augustine's Confessions: And men go about to wonder at the heights of the mountains, and the mighty waves of the sea, and the wide sweep of rivers, and the circuit of the ocean, and the revolution of the stars, but themselves they consider not.

Alma, calla y tus penas no rechaces, templa el dulce amargor que te ha ofendido, que un dulce honor amando has conseguido