"He who has believed and has been baptized shall be saved; but he who has disbelieved shall be condemned" (Mark 16:16).
This is a pretty easy verse to understand. Jesus specifically states two things that are necessary for salvation -- belief and baptism.
Yet many claim that this is not what the passage teaches. Most of the "Christian" religions teach that baptism is not necessary for salvation. How do they explain this passage then? They see that the second part of the verse says disbelief results in condemnation, and then point out that it does not explicitly say that not being baptized will cause one to be condemned. Therefore, they say, baptism is not necessary for salvation. This type of reasoning is exactly what Paul warned about: "trickery of men...deceitful scheming" (Ephesians 4:14).
Read the passage again. "He who has believed and has been baptized shall be saved; but he who has disbelieved shall be condemned."
Jesus said the one who believes and is baptized shall be saved. Therefore, both belief and baptism are necessary for salvation. Do you believe His statement? If so, and you want to be saved, that is what you will do. But if not, "he who has disbelieved shall be condemned."