当官从政，首先要使民风民俗敦厚；处理事务，首先要抓住问题的本质。

The truth of our faith becomes a matter of ridicule among the infidels if any Catholic, not gifted with the necessary scientific learning, presents as dogma what scientific scrutiny shows to be false.

Do not feel absolutely certain of anything.

The only way to learn mathematics is to do mathematics.

Don’t wait for the perfect moment—take the moment and make it perfect.