Only those who have learned the power of sincere and selfless contribution experience life's deepest joy: true fulfillment.

Only those who have learned the power of sincere and selfless contribution experience life's deepest joy: true fulfillment.

只有那些懂得真诚和无私奉献的人，才能体会到生活中最深的快乐:真正的满足。

-- Tony Robbins 托尼·罗宾斯