“But also for this very reason, giving all diligence, add to your faith virtue, to virtue knowledge, to knowledge self-control, to self-control perseverance, to perseverance godliness, to godliness brotherly kindness, and to brotherly kindness love. For if these things are yours and abound, you will be neither barren nor unfruitful in the knowledge of our Lord Jesus Christ. For he who lacks these things is shortsighted, even to blindness, and has forgotten that he was cleansed from his old sins.” 2 Peter 1:5-9
This is a trap many Christians fall into: we forget how much sin we have been forgiven of, we misjudge just how sinful we actually are, and we underestimate just how Holy God truly is.
If we are not in a constant state of love and gratitude, we are shortsighted, even to the point of blindness.