The mark of the immature man is that he wants to die nobly for a cause, while the mark of the mature man is that he wants to live humbly for one. Wilhelm Stekel
What I look forward to is continued immaturity followed by death. Dave Barry
Humanity has advanced, when it has advanced, not because it has been sober, responsible, and cautious, but because it has been playful, rebellious, and immature. Tom Robbins
For many, immaturity is an ideal, not a defect. Mason Cooley
Politics are usually the executive expression of human immaturity. Vera Brittain
Immature love says: ‘I love you because I need you.’ Mature love says: ‘I need you because I love you’. Erich Fromm