“[God] rescues us from the domain of darkness and brings us away into the kingdom of His dear Son, in whom our release is secured and our sins forgiven.”
Imagine a man drowning in the ocean. He has no way to rescue himself; he has kicked off his shoes, has tread water for as long as he is able; now, he is sinking. His end is near. Now imagine a rescue; perhaps a helicopter spotting him before he goes under for the last time lowers a boom and a strong arm reaches down into the ocean water and pulls him “from the domain of darkness” to safety. His “release” from his death “is secured;” and not by his own efforts.
God rescues us. He secures our release; He forgives us our sins. Not only this, but He “brings us away into the kingdom of His dear Son.” Our salvation is complete; we add nothing to it. The Word of God does not say, “Take two aspirin and call Me in the morning.” The Word of God says, “I Am the Way, the Truth, and the Life.” The Word of God says, “No one comes to the Father but by Me.”