Moses made brass serpent

Anyone who looked upon the the brass serpent who needed to he leaded from being bit by a serpent was healed. There were those who did not have the faith to look at the brass serpent. This was a type for having faith in Christ and being healed by his atoning sacrifice.

Read this article to learn more about having faith in Christ:
http://lds.org/general-conference/2004/10/finding-faith-in-the-lord-jesus-christ