By doubting we come at truth.
The world has not yet learned the riches of frugality.
What is there that is illustrious that is not also attended by labor?
There is no opinion so stupid that it can't be expressed by some philosopher.
Not to have knowledge of what happened before you were born is to be condemned to live as a child.
Nature has circumscribed the field of life within small dimensions, but has left the field of glory unmeasured.