"Tact is one of the first of mental virtues, the absence of which is frequently fatal to the best of talents. Without denying that it is a talent of itself, it will suffice if we admit that it supplies the place of many talents".
Joel Garreau (2005). “Radical Evolution: The Promise and Peril of Enhancing Our Minds, Our Bodies -- and What It Means to Be Human”, p.183, Broadway Books