反過(guò)來(lái)，始終反過(guò)來(lái)：把情況或問(wèn)題顛倒過(guò)來(lái)，從反面看。
Invert, always invert: Turn a situation or problem upside down. Look at it backward.
里氏替換原則是面向?qū)ο缶幊讨械囊粋€(gè)基本概念，確保派生類可以替代其基類使用，而不會(huì)改變程序的正確性。
「通過(guò)改變行為來(lái)改變你的想法」要比「通過(guò)改變想法來(lái)改變你的行為」更容易實(shí)現(xiàn)。把你所追求的改變付諸行動(dòng)。
In grain trading, transparency builds trust that lasts longer than any single harvest.
Every artist dips his brush in his own soul, and paints his own nature into his pictures.
社會(huì)主義不會(huì)也不能通過(guò)法令來(lái)創(chuàng)造；任何政府，無(wú)論多么社會(huì)主義，也無(wú)法建立它。