To abide in him is to remain in him as long as we live, that is for all eternity. We abide in him because we know him as our Lord and our Saviour, because we have vowed to obey him, and because we have fellowship with him.
If Christ is our standard, then we will need to continue to make progress until the last day of our lives. We will make progress as we gaze upon the glory of the Lord, and reflect deeply on his life: his person and his works, his words, his responses, his trials, and his victories.