The Nature of Sin

We have to recognize that sin is a fact of life, not just a shortcoming. Sin is blatant mutiny against God, and either sin or God must die in my life. The New Testament brings us right down to this one issue— if sin rules in me, God’s life in me will be killed; if God rules in me, sin in me will be killed. There is nothing more fundamental than that. The culmination of sin was the crucifixion of Jesus Christ, and what was true in the history of God on earth will also be true in your history and in mine— that is, sin will kill the life of God in us. We must mentally bring ourselves to terms with this fact of sin. It is the only explanation why Jesus Christ came to earth, and it is the explanation of the grief and sorrow of life.
Oswald Chambers - My Utmost For His Highest: June 23 Devotional

Sin is mutinous, sin kills, sin is a fact of life. Pretty dismal if that was all there was, if that was all we had to work with. If there was only our sinful selves, each and every one of us.

²³for all have sinned and fall short of the glory of God,
Romans 3:23 (NASB)

But we cannot give up for there is a hope we all have in our Savior.

¹Therefore, since we have so great a cloud of witnesses surrounding us, let us also lay aside every encumbrance and the sin which so easily entangles us, and let us run with endurance the race that is set before us, ²fixing our eyes on Jesus, the author and perfecter of faith, who for the joy set before Him endured the cross, despising the shame, and has sat down at the right hand of the throne of God.
Hebrews 12:1-2 (NASB)

We can mess things up on our own, we have proven that since the beginning, but we cannot make right what has gone astray. Not alone. Not without help.

But by the Lord's grace we have it.