Maulana Wahiduddin Khan I The Sunday Guardian I 3rd Mar. 2013 I Page 12

In mutual dealings in social life, it often happens that a person gives his word to another. There is apparently no third person or group between the two, yet there is always a third present, and that is, God, who is the supreme witness. That is why every promise becomes a divine promise.

A believer, therefore, is extremely sensitive about giving his word. His conviction is that every commitment made between two persons is under the watchful eyes of God, and that he will be accountable for its fulfilment in the court of God. This compels him to be highly responsible as regards his promises. Whenever he gives his word to anyone he makes a point of keeping it.
People, who, invariably fulfil their promises are predictable characters in a society, and give their society that particular quality which exists on a vast scale throughout the universe. Every part of this universe is functioning with the most exact precision. For instance, we can learn in advance about any star's or planet's rotation and where it will be moving after a 100 or even 1000 years. Similarly, we know in advance what the boiling point of water will be.

In this way the entire universe evinces a predictable character.

Many other virtues come in the wake of the regular fulfilment of promises. One of these is mutual trust. In a society where mutual trust exists, there is no discord and dissension between the people; there is an atmosphere of confidence and peaceability as there is no fear of promises being broken.

Readiness to fulfil promises is a commendable trait; it is iman, or faith, that makes man the possessor of this highest of human virtues.