“For he who lacks these things is shortsighted, even to blindness, and has forgotten that he was cleansed from his old sins.”
even to blindness
A blind person is unable to see. A spiritually blind person is unable to see spiritually. There is no spiritual understanding.
Many people are not able to see how God expects us to live. They cannot see truth.
Some Christians are spiritually blind.
Some Christians are saved eternally but they cannot spiritually see.
Even entire churches can be blind.
Re 3: 17 “Because you say, ‘I am rich, have become wealthy, and have need of nothing’—and do not know that you are wretched, miserable, poor, blind, and naked.”
There is a blind church! Christendom is filled with blind churches that are barren and unfruitful. These churches rarely experience someone coming to Christ.
There are people who live in the Rocky Mountains and never see the colossal scenery around them. People live within sight of majestic peaks and take them for granted and are not impressed with their grandeur. After Christians are saved for a few years, the wonder of the Christian life fades away for some. They are no longer fresh and spiritual things become commonplace to them.
This is why Paul had to exhort a young preacher to remember the person of Christ (2 Ti 2:8). Paul also preached the gospel to Christians (1 Co 15:1-4). We are prone to forget the wonder of our salvation. To see only what is near is a serious spiritual problem. Initial salvation is wonderful but let us move on to more mature things.