2 Peter 1:11

for so an entrance shall be ministered unto you abundantly into the everlasting kingdom of our Lord and Savior Jesus Christ.

Having depicted the way of sanctification, the development of a Christian in holiness, the apostle shows how self-evident is the life of good works: For as these virtues exist and increase to you, they will not set you forth idle or unfruitful toward the knowledge of our Lord Jesus Christ. With the very first beginning of faith the Christian will show, will give evidence of, its presence in good works and deeds. But there is no such thing as standing still in sanctification; a Christian must constantly increase and grow in good works, as the fruits and the outflow of the faith and the disposition and inclination toward all good virtues which live in his heart. Their power is so great as simply to render it impossible for a believer to be barren, like a withered tree, or unfruitful, like one that has foliage, but no fruit. Faith is a living, active power in the heart of the believer, and the more this power gives evidence of its existence in the entire life of the Christian, the more he will grow in the knowledge of the Lord Jesus Christ. That is the blessing which the Lord has laid upon the faithfulness for which He is ready to supply the Christian with new strength day after day. Colossians 1:10.

On the other hand, it is also true: For he with whom these virtues are not present is blind, being short-sighted, having assumed forgetfulness of the former cleansing of his sins. If a person does not possess faith and love toward God in his heart, even if he is a member of a Christian congregation, he is at least partially blind, since he is so short-sighted that he cannot look beyond the temporal things nearest at hand. His mind is engaged only with earthly matters, because he has forgotten what wonderful gifts the Lord imparted to him through the forgiveness of sins applied to him at the time when he came to faith. In other words, his behavior shows that he has lost the faith which was given him at the time of his conversion, he no longer has any eyes for the glories of heavenly things.

The admonition of the apostle, therefore, is altogether timely: So be all the more eager, brethren, to make sure your calling and election; for, doing this, you will never stumble. God has issued to us the call of grace in the Gospel, thus assuring our hearts of His justifying and saving grace, Romans 8:30. And this is in accordance with His election: for to this end God has predestinated and foreordained us, that we should be called, be justified and sanctified through faith, and be given eternal salvation, 1 Thessalonians 1:4. This call and election of God is sure on His part, 1 Peter 1:5; John 10:27. But it would be the height of foolish arrogance for a Christian to argue that he can act and live as he chooses in the world; for, according to the will of God, His elect children are to walk forward to the realization and enjoyment of their hope on the paths of sanctification, 2 Thessalonians 2:13; Ephesians 1:4. The argument of the true believer, therefore, is this, that he will be happy only on the ways of righteousness, in order that he may be certain and comfort himself with the assurance that he belongs to the elect of God, Ephesians 4:1: Philippians 2:12. Those that foolishly risk their soul's salvation by a life of sin and self-indulgence will soon find that they will stumble and fall, never to arise again. God will not be mocked.

The believers that are in every way conducting themselves as true children of God have the comforting assurance: For thus shall be richly furnished to you the entrance to the eternal kingdom of our Lord and Savior Jesus Christ. If Christians thus follow the will of their heavenly Father in making their calling and election sure, then God will mercifully reward their faithfulness. He will offer to them, He will open up before them, the way, the entrance to the riches of His mercy, that they may enter into, and enjoy to the fullest extent, the everlasting kingdom of our Lord and Savior Jesus Christ. Note the heaping up in this verse of words suggesting splendor and richness.