Learn to control ego. Humans hold their dogmas and biases too tightly, and we only think that our opponents are dogmatic! But we all need criticism. Criticism is the only known antidote to error.
David BrinThe measure of (mental) health is flexibility (not comparison to some 'norm'), the freedom to learn from experience ... to be influenced by reasonable arguments ... and the appeal to the emotions ... and especially the freedom to cease when sated. The essence of illness is the freezing of behavior into unalterable and insatiable patterns.
David Brin