It is rightly laid down that 'true knowledge is knowledge by causes'. Also the establishment of four causes is not bad: material, formal, efficient and final.
Begin doing what you want to do now. We are not living in eternity. We have only this moment, sparkling like a star in our hand - and melting like a snowflake.
Antiquities, or remnants of history, are, as was said, tanquam tabula naufragii: when industrious persons, by an exact and scrupulous diligence and observation, out of monuments, names, words, proverbs, traditions, private records and evidences, fragments of stories, passages of books that concern not story, and the like, do save and recover somewhat from the deluge of time.
I think that one of the things is that, if you are going to decide to be a painter, you have got to decide that you are not going to be afraid of making a fool of yourself. I think another thing is to be able to find subjects which really absorb you to try and do. I feel that without a subject you automatically go back into decoration because you haven't got the subject which is always eating into you to bring it back - and the greatest art always returns you to the vulnerability of the human situation.