Until you believe that you have all the resources within your own personhood to ruin your own life, you don’t really believe in total depravity. Until you believe that you are fully capable of blowing up important relationships in your life for bad reasons, you don’t believe in total depravity. Until you believe that someday it may actually seem like a good idea to stop worshiping God all together or to quit being a part of his family, you don’t believe in total depravity. This is what it means to say sin has so corrupted our nature that we are prone to hate our neighbor and hate God.
But, conversely, unless we believe God can intervene in the life of such a one, and give him or her gloriously different thoughts and desires than these, we also don’t really believe that “Christ Jesus came to save sinners, of whom I am the foremost.”
The bad news is bad, but the good news is greater.