You can't go back and change the beginning, but you can start where you are and change the ending.

An understanding of the natural world and what's in it is a source of not only a great curiosity but great fulfillment.

极不切实际的梦想即使没有实际权力做后盾，一样可以让人产生最大无畏的胆气。这是因为，怀有大希望者的力量可以有最荒谬的来源：一个口号、一句话或一枚徽章。

安全是最大的效益，事故是最大的浪费。

Always listen to your gut. It knows what your head hasn’t figured out yet.

最大的幻觉是分离的幻觉。