Biblical explanation
The Old Testament contains some of the Bible's strongest statements about God's love: "The LORD hath appeared of old unto me, saying, Yea, I have loved thee with an everlasting love." Jeremiah 31:3 The New Testament contains some of its strongest statements about judgment. Jesus Himself warned about: Gehenna Judgment The destruction of the wicked The final separation of humanity Matthew 25:31-46; Mark 9:43-48. At the same time, the Old Testament repeatedly describes God's mercy, while the New Testament repeatedly teaches His justice. The same God says: "I, the LORD, I change not." Malachi 3:6 And the New Testament says: "Jesus Christ the same yesterday, and to day, and for ever." Hebrews 13:8 The difference between the Testaments is primarily one of covenant setting, historical circumstances, and the unfolding revelation of God's plan, not a change from one God into another.
Key takeaway
Discipleship applies the gospel to the whole life: body, mind, relationships, work, finances, and worship. Healthy choices and faithful habits do not earn salvation; they are grateful stewardship of the life God has entrusted to us and practical ways to serve others.