The first thing is that the only way to obtain salvation is through the death of Christ on the cross, there is no other way, it is not something that we can obtain by ourselves or by our good works. The only work that has been able to satisfy the divine will of God is the death or the finished work of Christ on the cross, that blood that gave us salvation and eternal life. The only one who can save us is God, so trying to save ourselves by our own strength is an attempt that will always fail.
We already know that salvation can not be obtained in a human way, but it is a divine intervention, but we must also understand that we are not Christians to sit or do what we want, we must act, even if the works do not save us, we must understand that a saved Christian will do good deeds, behave as such, live as such.
2 Like newborn babies, crave pure spiritual milk, so that by it you may grow up in your salvation,
3 now that you have tasted that the Lord is good.
1 Pedro 2:2-3