Erasmus Darwin (1807). “The Botanic Garden: A Poem, in Two Parts: Part I. Containing The Economy of Vegetation. Part II. The Loves of the Plants”, p.22
"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".