"Traveling is a brutality. It forces you to trust strangers and to lose sight of all that familiar comfort of home and friends. You are constantly off balance. Nothing is yours except the essential things: air, sleep, dreams, the sea, the sky - all things tending towards the eternal or what we imagine of it."
人的精神本喜欢清净,但被心所扰乱;人心本喜欢宁静,但被欲望所牵引。
The beauty of mathematics lies in its simplicity and universality.