“Many people take no account of their own gifts; they see only the gifts of others and are overcome by envy. They view themselves as having been wronged, as lesser, and end up tormenting themselves, making their lives miserable. They say to themselves, “Why should he have those gifts and not I?” But, you see, he has his own gifts, and you have others. Do you remember Cain and Abel? Cain did not seek out his own gifts, but looked upon the gifts of Abel, which is how he cultivated malicious envy toward his brother; then he turned against God, and from envy, went on to murder.1 Yet, he might have had more and greater blessings than Abel.”
– ‘Passions and Virtues’