"To be faithful or fidelity is to remain, to be firm in what we started, to have faith, to be reliable and responsible people, fidelity is loyalty at all costs.
The faithful person is one who keeps his promises and maintains his loyalty even with the passage of time and different circumstances.
It must be said that fidelity is a vital part of love, since “there is no love without trust” or vice versa “you cannot trust without loving”. And since God is Love, He is FAITHFUL.