The beauty and mystery of this world only emerges through affection, attention, interest and compassion.
The alternation of motion is ever proportional to the motive force impressed; and is made in the direction of the right line in which that force is impressed.
自身无灾无病，感受不到快乐，等到生病卧床，才了解到无灾无病的快乐；家中平安无事，感受不到快乐，等到祸事临头，才体会到平安无事的快乐。
数学是人类精神最美丽和最强大的创造。
The mind is a biological instrument for managing life's challenges.