But, being rich with mercy, God, through His great love with which He has loved us though we were dead in trespasses, has made us alive with Christ (by grace you have been saved)
The point of Paul telling us where we have come from in the past couple of verses is to make clear to us the boundless mercy and grace that has been giving to us. The point of the concepts of mercy and grace is that we do not deserve them.
And that is one of the principle differences between Christianity and any other faith (at least that I am aware of). In man-made religions, humans achieve a particular end, by some means. In Christianity, we are rescued from our own nature.
Lord, Thank you for the marvelous salvation that you have bestowed upon us! Thank You for Your unending grace to us. I can never fully understand it Lord. I can never fully grasp why You would sacrifice so much for us, who are so little. We praise Your name!