Key points from this section:

• Keys of the Kingdom: Section 65 emphasizes that the keys of the kingdom of God are committed to man on earth, and the gospel will roll forth to fill the whole earth.
• Preparation for the Second Coming: It highlights the need to prepare for the Second Coming of Jesus Christ, urging the Saints to make ready for the Bridegroom and the millennial kingdom.
• Prayer and Praise: The section encourages the Saints to pray and call upon the Lord, making known His wonderful works and preparing for the days when the kingdom of God will join the kingdom of heaven."

Read this chapter for free at https://byustudies.byu.edu/online-book/doctrine-and-covenants-contexts/section-65.