数学不是一门演绎科学——那是陈词滥调。当你试图证明一个定理时,你不仅仅是列出假设然后开始推理。你所做的是反复试验、实验和猜测。
不是知识,而是学习的行为;不是占有,而是到达的过程,才能带来最大的快乐。
Innovation without execution is just imagination.
In the fields of observation chance favors only the prepared mind.
We measure success not just in tons of fish, but in the legacy we leave behind.
——在黄埔军校开学礼演说,1924年6月16日
The past is hidden somewhere outside the realm, beyond the reach of intellect, in some material object (in the sensation which that material object will give us) which we do not suspect.