A person may cause evil to others not only by his actions but by his inaction， and in either case， he is justly accountable to them for the injury.

Escribir es recordar, pero también es olvidar.

Topology is the study of the properties of a figure that are unchanged by any deformation.

Life is not easy for any of us. But what of that? We must have perseverance and above all confidence in ourselves. We must believe that we are gifted for something and that this thing must be attained.

Life is a song, love is the music.

There are some things so serious you have to laugh at them.

【释义】天傲慢之心不可助长，欲望不可放纵，志气不可自满，享乐不可到达极点。