Good acts beget a state of happiness, and sinful deeds bring on woe. One always reaps the fruit of one's acts. One never enjoys of suffers happiness or misery that is not the outcome of one's own acts.
शुभेन कर्मणा सौख्यं दुःखं पापेन कर्मणा। कृतं भवति सर्वत्र नाकृतं विद्यते क्वचित्॥