幸福的秘密是自由,自由的秘密是勇气。
可持续性不仅仅是种树;而是种下能成长为行动的想法。
财富是人类思考能力的产物。
The only limits you have are the limits you believe.
There is danger from all men. The only maxim of a free government ought to be to trust no man living with power to endanger the public liberty.