Note: As the Church has said, the manual has been prepared as the primary source of lesson material. These supplements, from general conference addresses, are meant only as a complement to your study on this lesson’s topic.
Supplement is from Elder Bruce D. Porter's talk, "Building the Kingdom of God" from the April 2001 general conference:
The Lord’s kingdom encompasses not only Church and family, but also the hearts and minds of His people. As the Savior taught during His mortal ministry, “The kingdom of God is within you” (Luke 17:21). If we truly desire to contribute to the great latter-day work, our eyes will be single to the glory of God, our minds enlightened by “the testimony of Jesus” (Rev. 19:10), our hearts pure and consecrated. Personal prayer, study, and pondering are vital to the building up of the kingdom within our own souls. It is in quiet moments of contemplation and communion with the Almighty that we come to know and love Him as our Father.
I bear witness that the kingdom of God has been restored to the earth, never to be taken away again. Under the direction of our Eternal Father, Jesus Christ is the Author and Finisher of this work, the cornerstone of the Church, and the Holy One of Israel. In the strength and power of the Lord, may we build up the kingdom of God on earth that it may be prepared to meet the kingdom of heaven at His coming.