Nothing else is required to pay for our salvation. It has been completed by Jesus.
To be saved, all we must do is believe in the Lord Jesus Christ and His sacrifice for our sins.
If you have questions, there is more about Jesus and our salvation here
Commentary from the In Touch devotional by Charles Stanley, May 18, 2020.
One’s response to the light in this life is crucial, because at the throne of judgement there will be no opportunity to embrace truth that was formerly spurned (Revelation 20:11-15). Those who scorn the light of the gospel now will have all light removed from them in eternity.
Commentary from the MacArthur study Bible, notes for Luke 8:18.
A permanent respite found in the grace of God which is apart from works.