Tusculan Disputations: On the Nature of the Gods, and on the Commonwealth

[I]f the Gods have neither the power nor the inclination to help us; if they take no care of us, and pay no regard to our actions; and if there is no single advantage which can possibly accrue to the life of man; then what reason can we have to pay any adoration, or any honors, or to prefer any prayers to them? Piety, like the other virtues, cannot have any connection with vain show or dissimulation; and without piety, neither sanctity nor religion can be supported; the total subversion of ...