First and last, what is demanded of genius is love of truth.

Begin by instructing yourself, then you will receive instruction from others.

Only learn to seize good fortune, for good fortune's always here.

I am the spirit that negates. And rightly so, for all that comes to be Deserves to perish wretchedly; 'Twere better nothing would begin. Thus everything that that your terms, sin, Destruction, evil represent— That is my proper element.

The works of Lavoisier and his associates operated upon many of us at that time like the Sun's rising after a night of moonshine: but Chemistry is now betrothed to the Mathematics, and is in consequence grown somewhat shy of her former admirers.

Man believes himself always greater than he is, and is esteemed less than he is worth.

Master and Doctor are my titles; for ten years now, without repose, I held my erudite recitals and led my pupils by the nose.