"Kant was a very attractive man: 'His hair was blond, the color of his face fresh, and his cheeks showed even in old age a healthy blush.' His eyes were particularly arresting. As one contemporary excaimed: 'From where do I take the words to describe to you his eye! Kant's eye was as if it had been formed of heavenly ether from which the deep look of the mind, whose fiery beam was occluded by a light cloud, visibly shone forth. It is impossible to describe the bewitching effect of his look on my feeling when I sat across him and when he suddenly raised his lowered eyes to look at me. I always felt as if I looked through his blue ether-like fire into the most holy of Minerva.'"
- Manfred Kuehn, "Kant: A Biography", p. 116.