没有孩子的民族将面临无望的未来；没有树木的国家将面临更加无望的未来。

哲学的本质不在于它提供的答案，而在于它提出的问题。

Courage isn't the absence of fear, but the will to keep going.

Profit without purpose is chemistry without catalysts - possible, but painfully slow and inefficient.