"The future growth of the Church will not happen through just knocking on strangers' doors. It will happen when the members, along with our missionaries, filled with the love of God and Christ discern needs and respond to those needs in the spirit of charitable service.
When we do this... the honest in heart will feel our sincerity and our love. Many will want to know more about us. Then and only then will the Church expand to fill all of the earth.
...we need to be sensitive to the promptings of the Holy Ghost. The still, small voice will let us know who needs our help and what we can do to help them."
Elder M. Russell Ballard
Ensign, May 2011, page 48