For God so loved the world that he sent his only son, that whosoever believes in Him will not perish but have everlasting life. John 3:16
For He (God) made Him (Jesus) who knew no sin to be sin for us, that we might become the righteousness of God in Him. 2 Corinthians 5:21
Jesus Christ died on the cross even though He never sinned, so that we, who have sinned, would have a way to be saved from our sins. The offer of salvation is only put forth by Jesus and putting your faith in Hi is the only way to be saved. While this is merely scratching the of what it means to be a Christian, it is the starting point.
If you have question about what it means to be a Christian, please ask through a phone call (912-576-5216) or email (email@example.com).