There is something about this story that hits me in the heart every time that I read. Personally, the verse has changed me and it epitomizes what the gospel does for us as individuals. Because of the impact of this simple statement of faith, I think that its words resonate an idea that can truly change the world.
It may have been a while since you stumbled on this one so let me refresh your memory with the back story. In this chapter Jesus meets a man who has brought his son that has been cursed with a "dumb spirit". The father brought the son to the disciples of Jesus to have the spirit cast out but the disciples were not able to do so. Jesus asked for the son to be brought to him. Jesus then asks how long the son has been in this condition and the father says that he has been like this since he was a child. After the father begs for compassion and help from the savior, Jesus teaches him that "If thou canst believe, all things are possible to him that believeth." And then we read...
As a father, there are so many things that hit hard in this one verse. I think of a struggling father who has felt years of pain and agony as he has watched his son suffer. I think of the hope that he had harbored, believing in the miracles that he had heard Christ and his disciples performing. Then I picture the man straightway crying out, "Lord, I believe; help thou mine unbelief".
What a tremendous example this man is to me. Too often, I think I become somewhat complacent in my own faith and testimony of what I know to be true. I sometimes think that I am living off of "borrowed light" or spiritual strength from experiences in my past. What this verse teaches me is that I should be going to my God and asking for help in those areas where I lack faith, and there are plenty! This idea of asking God, through the Atonement of His Son Jesus Christ to help me in "mine unbelief" is a principle of salvation and if we apply this teaching to our lives, we will become better husbands, fathers, and men. Indeed, this idea can change the world as we know it.