The best investment you can make is in yourself.
你必须在别人不努力的时候努力,这样你才能在别人不发光的时候发光。
And I urge you to please notice when you are happy, and exclaim or murmur or think at some point, 'If this isn't nice, I don't know what is.'
The best performance improvement is the transition from the nonworking state to the working state.