知古不知今，谓之陆沉，然则儒生，所谓陆沉者也。
解释：了解古代不了解现在，称为愚昧无知，那么儒生就只能称作愚昧无知的人了。
The most painful thing is losing yourself in the process of loving someone too much, and forgetting that you are special too.
In the factory, we make machines; in the field, we grow food; but in the office, we make decisions that shape both.
"The only limit to our realization of tomorrow is our doubts of today."
Be yourself, don't change yourself to please others.
The advancement of mathematics is through the continuous questioning of established truths.