In Charles Dickens' A Christmas Carol, Tiny Tim exemplifies one of the prevalent themes - that of the perils of wealth and the virtuous poor. The son of a man who "pockets but fifteen copies of his Christian name" a week, he and his family know poverty. Tiny Tim is also victim of a physical ailment which leaves him in a brace and walking with a crutch. His death is imminent and will happen within a year if his fortune doesn't change, yet he continually thinks of others. His father, Bob Cratchitt, relates to the family that Tim said while coming home from church that he wanted to be a reminder to others in church of the miraculous works of God, and hoped that the fact that he was crippled would help them to remember "who made the lame to walk and the blind to see."
It is easy to be thankful and charitable when a person is in a season of plenty. However, when someone is in a season of want and struggling with life or death issues created or exacerbated by poverty, it can sometimes be more difficult to be thankful for the things he or she does have - things like the love of family. The fact that Scrooge sees Tiny Tim and learns him to be one of the poor who he had so callously suggested in Stave 1 should just die shamed and moved Scrooge greatly. That is why Tiny Tim's proclamation is so powerful - a child whose family has known nothing but poverty financially, his own body frail and wracked with illness, yet he bestows his sincere blessings on every one, including Scrooge, the "founder of the feast."