Ezra Taft Benson
"The principles to activate souls do not change. The lost or less-active must be found and contacted. Loving concern must be demonstrated. They must feel of our love. They must be taught the gospel. They must feel the power of the Holy Ghost through the teachers. They must be included in our fellowship. They must have meaningful Church responsibilities. In the words of the Book of Mormon, we are to 'continue to minister' (3 Nephi 18:32). We are particularly concerned that new converts be integrated into full fellowship in the Church. They must be welcomed with open arms." (Teachings of Ezra Taft Benson, p. 234)
Neal A. Maxwell
"Whatever the individual case, our task is to 'continue to minister' without cynically computing the odds, 'for unto such shall ye continue to minister; for ye know not but what they will return and repent, and come unto me with full purpose of heart, and I shall heal them; and ye shall be the means of bringing salvation unto them' (3 Nephi 18:32).
"Of course, the determined offenders may ignore even our best efforts. Being 'free to choose' for themselves, they may crash through all reproof and restraint. Nevertheless, in our sometimes collective failure to try at all, we all fail. Then we gather solemnly at the foot of the cliff, hoping to salvage something from the smoking, twisted human wreckage. Instead we might have been loving, restraining sentries atop the cliff, or workers called upon to oversee, repair, and replace the guardrails.
"You will be blessed to know how to proceed. Your love may not be reciprocated, but it will not be wasted. Don't fret over possible clumsiness on your part. Real love is felt even when it is poorly expressed. Furthermore, if we '[show] forth afterward an increase of love' (D&C 121:43) we will more likely be seen as a true friend and not an enemy.
Never forget Jesus' encouragement and direction: 'Moreover if thy brother shall trespass against thee, go and tell him his fault between thee and him alone: if he shall hear thee, thou hast gained thy brother' (Matthew 18:15). No one is finally lost until we give up!
"May you 'gain' back your friend. Mind the moment, and eternity will take care of itself." (That Ye May Believe, p. 162-3)