Getting wet does not make you a Christian any more than getting full of oil makes you an automobile mechanic. You do not get baptized to become a Christian, you become a Christian to get baptized. It is a relationship not a ritual that makes you a Christian. They are some who think that they are Christians simply because they believe they are. You could believe that you are an apple tree, but that doesn't make you one.
Faith is only as good as what it is invested in.
If your faith is not invested into truth, you are in deep trouble. Believing in God There are also some people who think that believing in God makes one a Christian. You believe that there is one God. You do well. Clearly believing in God does not make a person a Christian.