If the doors of perception were cleansed every thing would appear to man as it is: infinite. For man has closed himself up, till he sees all things thro narrow chinks of his cavern. – William Blake
Shun no toil to make yourself remarkable by some talent or other yet do not devote yourself to one branch exclusively. Strive to get clear notions about all. Give up no science entirely for science is but one. – Lucius Annaeus Seneca