Challenge, the feeling of accomplishment, and knowing that you have made a contribution.
挑战,成就感和知道自己做出了贡献。
Our own actions are our security, not others' judgements.
我们的行为是自己的保证而不是别人的鉴定。
The hardened professional smuggler, on the other hand, is never troubled by such feelings, even if he has five hundred gold watches hidden in his suitcase.