The four essential principles and practices of Christianity (i.e. the Kingdom of Heaven where Christ is King) according to Scripture are based on:
1. Humility or faith and trust in God which is the foundation of all true relationships with God.
2. Communication with God through prayer and self-denial.
3. Observance of The Law which is written in Scripture and in the hearts of those who love the truth.
4. The offering of sacrifice to God and partaking of the sacrificial offering (various animal and bird offerings in the Old Testament, the Lamb of God in the New Testament, the sacrifice of the Mass in the Catholic Church).