Can small things make big impacts?

What about sin? 1 Cor. 5:1-8; 2 Tim. 2:15-18; 2 Tim. 3:13; Hos. 8:7

How can my actions affect others? Mark 9:42-48; Mark 8:36-37; 1 Thes. 5.1-24

What if every Christian flapped their wings?