"And the Pharisees and their scribes grumbled at his disciples, saying, “Why do you eat and drink with tax collectors and sinners?” And Jesus answered them, “Those who are well have no need of a physician, but those who are sick. I have not come to call the righteous but sinners to repentance.” - Luke 5:30-32
I have performed a vast number of funerals for people who would not visit their doctor when sick. Somehow such people believed that if they went to the doctor, clinic or hospital something would be discovered that would kill them. So, by avoiding medical care their assumed health killed them.
Spiritual illness is even more dangerous if ignored. In many ways the sinful heart is like high blood pressure... it's a silent killer. As long as we believe we are righteous and deserving of heaven, we are in serious danger. When we acknowledge our sin sickness by coming to the Great Physician in repentance, we will be saved. But, when we avoid spiritual care, our assumed righteousness will kill us.
Be honest with yourself and the Lord my friend. We are all sin-sick rebels, separated from a Holy God and bound for eternal condemnation in hell. (Romans 3:23) None of us are righteous, no, not one (Romans 3:10) We need the saving, healing touch of the Great Physician to give us new life. Remember, avoiding His spiritual care by assuming you're righteousness will ultimately kill you!