Passage

Qualities present and increasing

Source and translation

World English Bible, Protestant Edition · Public domain · en

⁸For if these things are yours and abound, they make you to not be idle or unfruitful in the knowledge of our Lord Jesus Christ.

2 Peter 1:8World English Bible, Protestant Edition

The scene

The letter says that having these qualities in abundance keeps the recipients from being idle or unfruitful in knowing Jesus Christ.

To understand

The preceding line names brotherly affection and love. The next describes someone lacking these things as shortsighted and forgetting the cleansing of former sins.

A question

What does the letter say the person lacking these qualities has forgotten?