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The proper study of mankind is man in his relation to his deity.

The most wonderful study of mankind is man. Relieving human suffering and diffusing universal knowledge is humanitarian.

The man of science, like the man of letters, is too apt to view mankind only in the abstract, selecting in his consideration only a single side of our complex and many-sided being.

No man is so great as mankind.

There is a great deal of human nature in man.

Man, in the collective sense, is the hero of science. Man, in the collective sense, is the hero of Earth.

Know then thyself, presume not God to scan; The proper study of mankind is man.