To love is to place our happiness in the happiness of another.

[Wisdom is] the science of happiness or of the means of attaining the lasting contentment which consists in the continual achievement of a greater perfection or at least in variations of the same degree of perfection.

Music is a secret and unconscious mathematical problem of the soul.

Music is a secret arithmetical exercise and the person who indulges in it does not realize that he is manipulating numbers.

There are two kinds of truths: those of reasoning and those of fact. The truths of reasoning are necessary and their opposite is impossible; the truths of fact are contingent and their opposites are possible.

Although the world is not perfect, it is yet the best that is possible.