How do we know Jesus as the Savior is true?

The truth of Jesus being the Savior is substantiated by the testimonies of those who encountered Him directly, as demonstrated in John 4:42. The Samaritans declared their belief not just based on the woman's words but because they personally heard Christ and recognized Him as the Messiah. Furthermore, the experiences of countless believers throughout history affirm this truth, as Christ continues to reveal Himself and save those who seek Him. This personal revelation reinforces the factual basis of His role as the Savior.