#obligation

To realize one’s destiny is a person’s only obligation.

From The Alchemist by Paulo Coelho

A duty is an action that is necessary and can be done from respect for the law.

From The Metaphysics of Morals by Immanuel Kant

Debt can create a sense of obligation that transcends simple transactions.

From Debt: The First 5000 Years by David Graeber

Reciprocity is the principle that people feel obligated to return favors.

From Influence: The Psychology of Persuasion by Robert Cialdini