Those who become enamoured of the art, without having previously applied to the diligent study of the scientific part of it, may be compared to mariners who put to the sea in a ship without rudder or compass and therefore cannot be certain of arriving at the wished for port.

A clever man without wisdom is like a beautiful flower without fragrance.

One day the world will look upon research upon animals as it now looks upon research on human beings.

I am not poor. Poor are those who desire many things.

Good culture is born of a good disposition; and since the cause is more to be praised than the effect, I will rather praise a good disposition without culture, than good culture without the disposition.

He who does not oppose evil......commands it to be done.

It's not enough that you believe what you see. You must also understand what you see.