The best moments in our lives are not the passive, receptive, relaxing times... The best moments usually occur if a person's body or mind is stretched to its limits in a voluntary effort to accomplish something difficult and worthwhile.
動態(tài)規(guī)劃理論基于最優(yōu)性原理，該原理指出，無論初始狀態(tài)和初始決策如何，剩余決策必須構(gòu)成關(guān)于第一個決策所導(dǎo)致狀態(tài)的最優(yōu)策略。
You can't go back home to your family, back home to your childhood, back home to romantic love, back home to a young man's dreams of glory and of fame, back home to exile, to escape to Europe and some foreign land, back home to lyricism, to singing just for singing's sake, back home to aestheticism, to one's youthful idea of 'art' and beauty, back home to the ivory tower, back home to places in the country, to the cottage in Bermuda, away from all the strife and conflict of the world, back home to the father you have lost and have been looking for, back home to someone who can help you, save you, ease the burden for you, back home to the old forms and systems of things which once seemed everlasting but which are changing all the time—back home to the escapes of Time and Memory.
Stay humble, stay hungry, and never stop learning.