Photo Credit: Archibald Ballantine (zoetnet)~ Creative Commons
"Go up and down the streets of Jerusalem, look around and consider, search through her squares. If you can find but one person who deals honestly and seeks the truth, I will forgive this city" Jeremiah 5:1
God made this statement prior to his judgment on Judah for their disobedience. This is not the first time God made such a remark about sparing a city if a small remenant of faithful followers could be found; he said the same about Sodom (Genesis 18:32).
One faithful person was all it would have taken for God to forgive the entire nation's sins. It just goes to show how powerful the influence of a faithful person is.
"It doesn't matter what I do. I can't make a difference by myself." are lies. We discount God's power and our influence as a Christian whenever we accept those lies.
We need to be faithful even when others are not. We need to remain faithful when we feel like giving up. We need to be faithful even when we can't see that we are making a difference. We need to remain faithful not for any acclaim that we may receive, but because it's the right thing to do. We need to be faithful because our Lord is faithful to us...always has been and always will be.