"every one of our Heavenly Father’s children, on both sides of the veil, deserves to hear the message of the restored gospel of Jesus Christ"

" My dear young brothers and sisters, these surely are the latter days, and the Lord is hastening His work to gather Israel. That gathering is the most important thing taking place on earth today. Nothing else compares in magnitude, nothing else compares in importance, nothing else compares in majesty. And if you choose to, if you want to, you can be a big part of it. You can be a big part of something big, something grand, something majestic!

When we speak of the gathering, we are simply saying this fundamental truth: every one of our Heavenly Father’s children, on both sides of the veil, deserves to hear the message of the restored gospel of Jesus Christ. They decide for themselves if they want to know more."

- President Russell M. Nelson, "Hope of Israel," New Era, Aug 2018

https://www.churchofjesuschrist.org/study/new-era/2018/08-se/hope-of-israel?lang=eng

The purpose of gospel habits is primarily to receive the Holy Ghost

 "everything the Savior’s gospel teaches us to do and become is intended to bless us with the companionship of the Holy Ghost.

"Consider the reasons we pray and study the scriptures. Yes, we yearn to communicate in prayer with Heavenly Father in the name of His Son. And yes, we desire to obtain the light and knowledge available in the standard works. But please remember that these holy habits primarily are ways whereby we always remember Heavenly Father and His Beloved Son and are prerequisites to the ongoing companionship of the Holy Ghost.

"Reflect on the reasons we worship in the house of the Lord and in our Sabbath meetings. Yes, we serve our kindred dead in the temple—and our families and friends in the wards and branches in which we live. And yes, we enjoy the righteous sociality we find among our brothers and sisters. But we primarily gather together in unity to seek the blessings of and instruction from the Holy Ghost.

"Praying, studying, gathering, worshipping, serving, and obeying are not isolated and independent items on a lengthy gospel checklist of things to do. Rather, each of these righteous practices is an important element in an overarching spiritual quest to fulfill the mandate to receive the Holy Ghost. The commandments from God we obey and the inspired counsel from Church leaders we follow principally focus upon obtaining the companionship of the Spirit. Fundamentally, all gospel teachings and activities are centered on coming unto Christ by receiving the Holy Ghost in our lives."

- Elder David A. Bednar, Of the Quorum of the Twelve Apostles, "Receive the Holy Ghost," General Conference, Oct 2010, https://abn.churchofjesuschrist.org/study/general-conference/2010/10/receive-the-holy-ghost?lang=eng 

The temple is the object of all Church activity

 "The temple is the object of every activity, every lesson, every progressive step in the Church. All of our efforts in proclaiming the gospel, perfecting the Saints, and redeeming the dead lead to the holy temple."

- Elder Russell M. Nelson, Of the Quorum of the Twelve Apostles, Ensign, March 2002, https://www.churchofjesuschrist.org/study/ensign/2002/03/prepare-for-blessings-of-the-temple?lang=eng 

Everything in the whole gospel system is to prepare us to enter that holy order of matrimony

“From the moment of birth into mortality to the time we are married in the temple, everything we have in the whole gospel system is to prepare and qualify us to enter that holy order of matrimony which makes us husband and wife in this life and in the world to come. … There is nothing in this world as important as the creation and perfection of family units.”

- Elder Bruce R. McConkie, of the Quorum of the Twelve Apostles, Conference Report, Apr. 1970, 27, as quoted in "Strengthening the Family: The Family Is Central to the Creator’s Plan," Ensign, Dec 2004, p. 51
http://www.lds.org/liahona/2004/12/strengthening-the-family-the-family-is-central-to-the-creators-plan?lang=eng#footnote3-24992_000_007

Home teaching is the priesthood way of watching over the Saints

"Brethren, home teaching is not just another program. It is the priesthood way of watching over the Saints and accomplishing the mission of the Church. Home teaching is not just an assignment. It is a sacred calling.

"Home teaching is not to be undertaken casually. A home teaching call is to be accepted as if extended to you personally by the Lord Jesus Christ.

"The Savior Himself was a teacher. The only perfect man to walk the face of the earth was a humble, dedicated, inspired teacher who brought to His followers salvation and exaltation.

"Oh, that all the brethren of the Church would catch that vision of home teaching!"

- Pres. Ezra Taft Benson, President of the Church, "To the Home Teachers of the Church," General Conference, Apr 1987
http://www.lds.org/general-conference/print/1987/04/to-the-home-teachers-of-the-church?lang=eng

"We are here to cooperate with God in the salvation of the living, in the redemption of the dead, in the blessings of our ancestors, in the pouring out of blessings upon our children; we are here for the purpose of redeeming and regenerating the earth on which we live, and God has placed his authority and his counsels here upon the earth for that purpose, that men may learn to do the will of God on the earth as it is done in heaven. This is the object of our existence; and it is for us to comprehend the position."

- John Taylor, Teachings of Presidents of the Church: John Taylor, (2011), 182–90, Chapter 20: The Temple, the Gateway to Exaltation
http://www.lds.org/manual/teachings-john-taylor/chapter-20?lang=eng

"I know that the earth was created and that the Lord’s Church was restored so that families could be sealed and exalted as eternal entities."

- Elder Russell M. Nelson, Of the Quorum of the Twelve Apostles, "Nurturing Marriage," Ensign, May 2006, p. 36
http://www.lds.org/ensign/2006/05/nurturing-marriage?lang=eng

"Temple service is the end product of all of our teaching and activity."

- Pres. Gordon B. Hinckley, President of the Church, "Opening Remarks," Ensign, Nov 2005, p. 4
http://www.lds.org/ensign/2005/11/opening-remarks?lang=eng

The purpose of Church activity is eternal happiness

“The ultimate end of all activity in the Church is that a man and his wife and their children might be happy at home, protected by the principles and laws of the gospel, sealed safely in the covenants of the everlasting priesthood.”

- Pres. Boyd K. Packer, President of the Quorum of the Twelve Apostles, “The Power of the Priesthood,” Ensign, May 2010, p. 9
http://www.lds.org/ensign/2010/05/the-power-of-the-priesthood?lang=eng