My own experience and development deepen every day; my conviction that our moral progress may be measured by the degree in which we sympathize with individual suffering and individual joy.
Play not with paradoxes. That caustic which you handle in order to scorch others may happen to sear your own fingers and make them dead to the quality of things.
Science is properly more scrupulous than dogma. Dogma gives a charter to mistake, but the very breath of science is a contest with mistake, and must keep the conscience alive.
