“May I mention a matter close to my heart and which deserves our serious attention. I speak of missionary work.
“First, to young men of the Aaronic Priesthood and to you young men who are becoming elders: I repeat what prophets have long taught—that every worthy, able young man should prepare to serve a mission. Missionary service is a priesthood duty—an obligation the Lord expects of us who have been given so very much. Young men, I admonish you to prepare for service as a missionary. Keep yourselves clean and pure and worthy to represent the Lord. Maintain your health and strength. Study the scriptures. Where such is available, participate in seminary or institute. Familiarize yourself with the missionary handbook Preach My Gospel.
“A word to you young sisters: while you do not have the same priesthood responsibility as do the young men to serve as full-time missionaries, you also make a valuable contribution as missionaries, and we welcome your service.
“And now to you mature brothers and sisters: we need many, many more senior couples. To the faithful couples now serving or who have served in the past, we thank you for your faith and devotion to the gospel of Jesus Christ. You serve willingly and well and accomplish great good.
“To those of you who are not yet to the season of life when you might serve a couples mission, I urge you to prepare now for the day when you and your spouse might do so. As your circumstances allow, as you are eligible for retirement, and as your health permits, make yourselves available to leave home and give full-time missionary service. There are few times in your lives when you will enjoy the sweet spirit and satisfaction that come from giving full-time service together in the work of the Master.”
From October 2010 General Conference, Saturday Morning Session, As We Meet Together Again by President Thomas S. Monson.