All that one gains by falsehood is, not to be believed when he speaks the truth.

Every realm of nature is marvelous.

Happiness involves engagement in activities that promote one's highest potentials.

There is an ideal of excellence for any particular craft or occupation; similarly there must be an excellent that we can achieve as human beings. That is, we can live our lives as a whole in such a way that they can be judged not just as excellent in this respect or in that occupation, but as excellent, period. Only when we develop our truly human capacities sufficiently to achieve this human excellent will we have lives blessed with happiness.

Happiness is the meaning and the purpose of life, the whole aim and end of human existence.

Metaphor is halfway between the unintelligible and the commonplace.

These two rational faculties may be designated the Scientific Faculty and the Calculative Faculty respectively; since calculation is the same as deliberation, and deliberation is never exercised about things that are invariable, so that the Calculative Faculty is a separate part of the rational half of the soul.