每一個艱鉅的難題都暗藏著本身的解答，並且迫使我們改變自己的思維來探尋它。Every great and deep difficulty bears in itself its own solution. It forces us to change our thinking in order to find it.

Every great and deep difficulty bears in itself its own solution. It forces us to change our thinking in order to find it.－ Niels Bohr

每一個艱鉅的難題都暗藏著本身的解答，並且迫使我們改變自己的思維來探尋它。
－尼爾斯·波耳（1885 – 1962）丹麥物理學家，1922年諾貝爾物理獎。