Quotes and aphorisms about maturity Calvin Coolidge Kurt Vonnegut William Arthur Ward Abhay Deol Edith Stein ,, Peoplehood tends to develop into nationhood if the people achieves a certain maturity. This is anal... Gary Vaynerchuk ,, I think what's happening for me, it's fun to see other things besides Facebook and Twitter take hol... Jack Kornfield Karl Marlantes Karl Rahner Larry McMurtry