“Freedom to order our own conduct in the sphere where material circumstances force a choice upon us, and responsibility for the arrangement of our own life according to our own conscience, is the air in which alone moral sense grows and in which moral values are daily recreated in the free decision of the individual. Responsibility, not to a superior, but to one's own conscience, the awareness of a duty not exacted by compulsion, the necessity to decide which of the things one values are to be sacrificed to others, and to bear the consequences of one's own decision, are the very essence of any morals which deserve the name.”