John 3:14-16 The Lordship of Jesus is what brings about the Salvation of man through Jesus. Jesus is more than "the lamb that was slain" but He is the carrier of the authority in which our salvation is released. Romans 9:10 shows that every man that will be saved by Jesus Christ must first believe in Him.
Matthew 19:16-22 & Luke 9:23 Those who submit to the Lordship of Jesus are those that inherit the Kingdom of Christ. Salvation is not a cheap gift given without a cause neither is there a quick way to gain salvation. Submission to the Lordship of Jesus means we "deny ourselves, take our cross daily and follow Jesus", It must be a daily affair, not a one-off submission. This is the only way to inherit eternal life. No other way can grant us access to Gods salvation for us.
"For God so loved the world, that he gave his only begotten Son, that whosoever believeth in him should not perish, but have everlasting life."