Missionary work is not limited to proclaiming the gospel to every nation, kindred, tongue, and people now living on the earth. Missionary work is also continuing beyond the veil among the millions and even billions of the children of our Heavenly Father who have died either without hearing the gospel or without accepting it while they lived on the earth. Our great part in this aspect of missionary work is to perform on this earth the ordinances required for those who accept the gospel over there. The spirit world is full of spirits who are anxiously awaiting the performance of these earthly ordinances for them. I hope to see us dissolve the artificial boundary line we so often place between missionary work and temple and genealogical work, because it is the same great redemptive work!
President Spencer W. Kimball, The Things of Eternity – Stand We in Jeopardy?, 1977
I know many people who cannot wait to serve missions, or terribly miss their missions that they have already served. Many of us, me included, wish that we could spend more time actively participating in missionary work! Well, for those of us that are near one, visiting the temple is a great way to continue the work. As a side note, home and visiting teaching are great ways to perform missionary work. Missionary work is home teaching to people who are not members of The Church of Jesus Christ of Latter-day Saints. Home teaching is missionary work involved people that are already members. And family history and temple work is missionary work for those who have departed this life without the chance to receive the Gospel.
So if you are ever feeling like you need to do something to help with the work, do some indexing, some family history, go to the temple, and go home or visiting teaching! There are ample opportunities for all people, regardless of physical or other limitations, to help out! And if you are struggling to become worthy to enter the temple, do the other things on the list that do not require a recommend! This will bring the spirit into your life in a way that you cannot now realize. You will find the strength and desire to do the things that you need to do in order to bring salvation to yourself and others.