That which has no limitations, has no form.

Men of lofty genius when they are doing the least work are most active.

I love those who can smile in trouble, who can gather strength from distress, and grow brave by reflection. 'Tis the business of little minds to shrink, but they whose heart is firm, and whose conscience approves their conduct, will pursue their principles unto death.

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

simplicity is the best sophistication

Inequality is the cause of all local movements.

Just as iron rusts from disuse, and stagnant water putrefies, or when cold turns to ice, so our intellect wastes unless it is kept in use.