"The future tranquility of our minds"

Adam Smith:

The great source of both the misery and disorders of human life, seems to arise from over-rating the difference between one permanenet situtation and another… Some of those situations may, no doubt, deserve to be preferred to others; but none of them can deserve to be pursued with that passionate ardour which drives us to violate the rules either of prudence or of justice; or to corrupt the future tranquility of our minds, either by shame from the remembrance of our own folly, or by remorse from the horror or our own injustice.

(via Reflexiones a las once de la noche)