King of the animals — as thou hast described him — I should rather say king of the beasts, thou being the greatest — because thou hast spared slaying them, in order that they may give thee their children for the benefit of the gullet, of which thou hast attempted to make a sepulchre for all animals; and I would say still more, if it were allowed me to speak the entire truth.

Blinding ignorance does mislead us. O! Wretched mortals, open your eyes!

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

Make your work to be in keeping with your purpose

Nature is constrained by the cause of her laws which dwell inborn in her. Variant: Nature is constrained by the order of her own law which lives and works within her.

Your brain is much better than you think; just use it!

I have been impressed with the urgency of doing. Knowing is not enough; we must apply. Being willing is not enough; we must do.