智者的心灵是开放的书籍。
制革厂的遗产应以其对环境的守护来衡量。
色彩是键盘，眼睛是和声，灵魂是有许多琴弦的钢琴。艺术家是演奏的手，触摸一个又一个琴键，在灵魂中引起振动。
"Books are the most precious gifts we can give to a child."
L-函数的研究是探索数字隐藏模式的旅程。
The only limits you have are the limits you believe.
What other dungeon is so dark as one's own heart! What jailer so inexorable as one's self!
