The most beautiful thing in mathematics is the simplicity of the ideas behind the complexity.
When we are no longer able to change a situation, we are challenged to change ourselves.
Le rire est le soleil qui chasse l'hiver du visage humain.
Leadership means making tough decisions today that will benefit future generations.
"The use of traveling is to regulate imagination by reality, and instead of thinking how things may be, to see them as they are."
简单的事情应该简单,复杂的事情应该可能。