When you desire a personal relationship with God (salvation), the question becomes, do you need to make that dependency public or can it be kept private?
The Bible speaks to the need to make a public profession of faith, not a private, hidden acceptance of our relationship with God. Scripture is full of examples of the cost some paid for this acknowledgment. In countries such as Iran, China, and others, the ultimate cost continues as it did for most of the original disciples. Beyond real-life examples and Romans 10:9 above, are verses such as Matthew 10:32.