Then why do you want to know?" "Because learning does not consist only of knowing what we must or we can do, but also of knowing what we could do and perhaps should not do.

My collection of rare books concerns only books that don't tell the truth.

There are more books in the world than hours in which to read them. We are thus deeply influenced by books we haven't read, that we haven't had the time to read.

You must overcome any shyness and have a conversation with the librarian, because he can offer you reliable advice that will save you much time. You must consider that the librarian (if not overworked or neurotic) is happy when he can demonstrate two things: the quality of his memory and erudition and the richness of his library, especially if it is small. The more isolated and disregarded the library, the more the librarian is consumed with sorrow for its underestimation. A person who asks for help makes the librarian happy.

And when someone suggests you believe in a proposition, you must first examine it to see whether it is acceptable, because our reason was created by God, and whatever pleases our reason can but please divine reason, of which, for that matter, we know only what we infer from the processes of our own reason by analogy and often by negation.

With all of its defects, the global market makes war less likely, even between the USA and China.

There is only one thing that you write for yourself, and that is a shopping list.