It takes a very true man to be a fitting companion for a woman of genius, but not a very great one.
 Oliver Wendell Holmes Sr., The Professor at the Breakfast-Table (1860). copy citation

Context

“And so I have known more than one genius, high-decked, full-freighted, wide-sailed, gay-pennoned, that, but for the bare toiling arms, and brave, warm, beating heart of the faithful little wife, that nestled close in his shadow, and clung to him, so that no wind or wave could part them, and dragged him on against all the tide of circumstance, would soon have gone down the stream and been heard of no more.—No, I am too much a lover of genius, I sometimes think, and too often get impatient with dull people, so that, in their weak talk, where nothing is taken for granted, I look forward to some future possible state of development, when a gesture passing between a beatified human soul and an archangel shall signify as much as the complete history of a planet, from the time when it curdled to the time when its sun was burned out. And yet, when a strong brain is weighed with a true heart, it seems to me like balancing a bubble against a wedge of gold. —It takes a very true man to be a fitting companion for a woman of genius, but not a very great one. I am not sure that she will not embroider her ideal better on a plain ground than on one with a brilliant pattern already worked in its texture. But as the very essence of genius is truthfulness, contact with realities,” source