Mathematics (数学)
S.D. Poisson (1781-1840): Life was only good for two things: to do mathematics and to teach it.
K. Weierstrass (1815-1897): It is true that a mathematician who is not also something of a poet will never be a perfect mathematician.
J. Lagrange (1736-1813): I have always observed that the pretensions of all people are in exact inverse ratio to their merits; this is one of the axioms of morals.