The best and most beautiful things in the world cannot be seen or even touched - they must be felt with the heart.

The study of mathematics is the study of patterns.

心神应该保持平静稳定，骨力应该保持活动锻炼，胸怀应该保持宽广豁达，筋骨应该保持坚强硬朗，脊梁应该保持端正平直，肠胃应该保持素淡洁净，舌端应该保持谨慎寡言，脚跟应该保持坚定不移，耳目应该保持聪明朗洁，精神应该保持正直无邪。

出自《论语·为政》，王博在讲解儒家思想时引用并阐释。