But I knew that for me the hardest test would be to live with them in harmony and not to let my impatience master me; neither to withdraw into myself, nor to become critical of standards and ways of life different from my own. I knew from experience that the conditions under which we lived would slowly wear me down, mentally if not physically, and that I should be often provoked and irritated by my companions. I also knew with equal certainty that when this happened the fault would be mine not theirs.