I never guess. It is a capital mistake to theorize before one has data. Insensibly one begins to twist facts to suit theories, instead of theories to suit facts.

What we learn from history is that people don't learn from history.

每一个超限的一致多重性，即每一个超限集合，必须有一个确定的阿列夫作为其基数。

人类思维能够理解宇宙，因为它是宇宙的一部分。