Physicians think they do a lot for a patient when they give his disease a name.

Every man is to be respected as an absolute end in himself; and it is a crime against the dignity that belongs to him as a human being, to use him as a mere means for some external purpose.

Parents usually educate their children merely in such a manner than however bad the world may be, they may adapt themselves to its present conditions. But they ought to give them an education so much better than this, that a better condition of things may thereby be brought about by the future.

Out of the crooked timber of humanity, no straight thing was ever made.

Nature does nothing in vain, and in the use of means to her goals she is not prodigal.

We are not rich by what we possess but by what we can do without.

Always regard every man as an end in himself, and never use him merely as a means to your ends [i.e., respect that each person has a life and purpose that is their own; do not treat people as objects to be exploited].