酸和碱是互补的；没有另一个，一个就无法存在。
An ounce of practice is worth more than tons of preaching.
最大的荣耀不在于永不跌倒，而在于每次跌倒后都能站起来。
I do not wish them [women] to have power over men; but over themselves.
People with a sense of fulfillment think it a good world and would like to conserve it as it is, while the frustrated favor radical change.
Understanding the universe requires not just intelligence, but imagination.
