His rest. That promise has been repeated many times and in many forms. It is a promise large and glorious, a promise of victory over sin, Satan and the world, and of all the possibilities of grace and glory. But its fulfilment is dependent at every step upon our response and our faithfulness. There is a peace that passeth all understanding, but the condition must be met, “Be careful for nothing.” There is a “rest” unto our souls that we may find, but again the condition is, “Take My yoke upon you