A person who is good for anything ought not to calculate the chance of living or dying; he or she ought only to consider whether in doing anything he or she is doing right or wrong- acting the part of a good person or a bad person.

The science [geometry] is pursued for the sake of the knowledge of what eternally exists, and not of what comes for a moment into existence, and then perishes.

Is what is moral commanded by God because it is moral, or is it moral because it is commanded by God?

All the gold which is under or upon the earth is not enough to give in exchange for virtue.

Experience proves that anyone who has studied geometry is infinitely quicker to grasp difficult subjects than one who has not.

The most important part of education is proper training in the nursery.

Arithmetic has a very great and elevating effect, compelling the soul to reason about abstract number, and rebelling against the introduction of visible or tngible objects into the argument.