Never stop questioning how things can be done better—complacency is the enemy of progress.
逻辑学研究不仅仅是关于形式系统，更是关于人类推理的本质。
The melancholy science from which I make this offering to my friend relates to a region that from time immemorial was regarded as the true field of philosophy, but which, since the latter's conversion into method, has lapsed into intellectual neglect, sententious whimsy, and finally oblivion.
Work hard, be kind, and never give up. Success will follow.