When married couples are physically able, they have the privilege of providing mortal bodies for Heavenly Father’s spirit children. They play a part in the great plan of happiness, which permits God’s children to receive physical bodies and experience mortality.
If you are married, you and your spouse should discuss your sacred responsibility to bring children into the world and nurture them in righteousness. As you do so, consider the sanctity and meaning of life. Ponder the joy that comes when children are in the home. Consider the eternal blessings that come from having a good posterity. With a testimony of these principles, you and your spouse will be prepared to prayerfully decide how many children to have and when to have them. Such decisions are between the two of you and the Lord.
As you discuss this sacred matter, remember that sexual relations within marriage are divinely approved. While one purpose of these relations is to provide physical bodies for God’s children, another purpose is to express love for one another—to bind husband and wife together in loyalty, fidelity, consideration, and common purpose.
The introduction to the booklet has this statement from the First Presidency:
This book is designed as a companion to your study of the scriptures and the teachings of latter-day prophets. We encourage you to refer to it as you study and apply gospel principles. Use it as a resource when you prepare talks, teach classes, and answer questions about the Church.
As you learn gospel truths, you will increase in your understanding of Heavenly Father’s eternal plan. With this understanding as a foundation for your life, you will be able to make wise choices, live in harmony with God’s will, and find joy in living. Your testimony will grow stronger. You will remain true to the faith.
We are especially mindful of youth, young single adults, and new converts. We promise you that through regular personal prayer and study of the scriptures and the doctrines of the gospel you will be prepared to withstand evil influences that would deceive you and harm you.
May this book strengthen you in your efforts to draw near to the Savior and follow His example.
The First Presidency