Nature is the greatest teacher and I learn from her best when others are asleep.

Actions are right in proportion as they tend to promote happiness； wrong as they tend to produce the reverse of happiness.

Leadership is about making others better as a result of your presence and making sure that impact lasts in your absence.

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.'