Quotes from Ralph Barton Perry

Those who refuse to take a step toward their goal because it does not at once reach the goal are likely to stand still or move backward.

A man can do his best only by confidently seeking (and perpetually missing) an unattainable perfection.

What is needed in the present plight of mankind is not more science but a change of heart that shall move mankind to devote to constructive and peaceful purposes.

Indeed I am inclined to go so far as to say that the one cause for which one may properly make war is the cause of peace.

Ignorance deprives people of freedom because they do not know what alternatives there are. It is impossible to choose to do what one has never "heard of."