I am never less alone than when alone.

We are not born for ourselves alone.

You may never be less alone than when you are alone.

There is in fact a true law namely right reason, which is in accordance with nature, applies to all men and is unchangeable and eternal. ... It will not lay down one rule at Rome and another at Athens, nor will it be one rule today and another tomorrow. But there will be one law eternal and unchangeable binding all times and upon all peoples.

On the subject of the nature of the gods, the first question is Do the gods exist or do the not? It is difficult you may say to deny that they exist. I would agree if we were arguing the matter in a public assembly, but in a private discussion of this kind, it is perfectly easy to do so.

It is not only arrogant, but it is profligate, for a man to disregard the world's opinion of himself.

An acute first-class brain is the finest asset anyone can have- and, if we want to be happy, it is an asset we must exploit to the uttermost.