- SKY: Spirit, Know, Young - notebook covers.
- ”Great spirits have always found violent opposition from mediocrities.The latter cannot understand it when a man does not thoughtlessly submit to hereditary prejudices but honestly and courageously uses his intelligence.”
"Knowledge is the food of the soul."
"Anyone who stops learning is old, whether at twenty or eighty. Anyone who keeps learning stays young. The greatest thing in life is to keep your mind young. ”