Adelbert von Chamisso

This man, although he appeared so humble and embarrassed in his air and manners, and passed so unheeded, had inspired me with such a feeling of horror by the unearthly paleness of his countenance, from which I could not avert my eyes, that I was unable longer to endure it.

To ask questions can become the laziest and wobbliest occupation of a mind, but when you must yourself answer the problem that you have posed, you will meditate your question with care and frame it with precision.