"Conformity is the jailer of freedom and the enemy of growth."

"The only purpose for which power can be rightfully exercised over any member of a civilized community, against his will, is to prevent harm to others."

"The grand, leading principle, towards which every argument unfolded in these pages directly converges, is the absolute and essential importance of human development in its richest diversity."

"The principle itself of dogmatic religion, dogmatic morality, dogmatic philosophy, is what requires to be rooted out."

"The strongest of all arguments against the present constitution of society is, that it does not permit the free development of every individual."