The connecting word “But” introduces an exceptional relationship. God saves everyone who believes. But people who do not believe are excluded from the “everyone.” Alternate translation: “God will only save those who believe in Jesus and receive him as their Master. He will not save those who do not believe in him.” (See: [[rc://en/ta/man/translate/grammar-connect-exceptions]])
The connecting word “so” connects the reason—you believe in Jesus, with the result—he can be a friend to you. (See: [[rc://en/ta/man/translate/grammar-connect-logic-result]])