“Which of the two did what his father wanted?” Matthew 21:31
The longer a person is a believer the more susceptible they become to the diseases of an aging faith. This fact is observable in real life and evidenced throughout the Bible. These diseases attacking sustainable faith, like complacency, hypocrisy, self-righteousness, judgmentalism, cynicism and yes, even self-deception, rob the mature believer of a healthy and productive faith life. Anyone who has been a believer for some time and honestly reckons with these type of temptations inherent in a long term faith would readily admit it is true.
An appropriate term to describe this effect is believer geriatrics. It is interesting that the word geriatrics comes from combing two Greek words meaning “old man” (geron) and “healer” (iatros). The term geriatrics is used to describe the branch of medicine that focuses on preventing, diagnosing and treating the diseases of old age. Believer geriatrics then should focus on preventing, diagnosing and treating the diseases of an aging faith.
Having been a believer myself for many years I have noticed both in my own life and the lives of others how the initial conversion zeal to trust and obey God can wane. When I first surrendered my life to Jesus I committed to making Him Lord of every aspect of my life. I thought it was a one time decision. I sailed through the next couple of months with great joy and enthusiasm in obeying God and serving Him wholeheartedly. But eventually as He began to deal with some untouched areas in my life it dawned on me that yielding to His Lordship was an ongoing process.