Heidelberg Catechism - Lord's Day 6

Q & A 16 

Q. Why must the mediator be a true and righteous human? 

A. God’s justice demands 

that human nature, which has sinned,
must pay for sin;
but a sinful human could never pay for others.

1 Rom. 5:12, 151 Cor. 15:21Heb. 2:14-16
2 Heb. 7:26-271 Pet. 3:18

Q & A 17 

Q. Why must the mediator also be true God? 

A. So that the mediator, 

by the power of his divinity, 

might bear the weight of God’s wrath in his humanity 

and earn for us
and restore to us 

righteousness and life.

1 Isa. 53John 3:162 Cor. 5:21

Q & A 18 

Q. Then who is this mediator—
true God and at the same time
a true and righteous human? 

A. Our Lord Jesus Christ,

who was given to us
to completely deliver us
and make us right with God.

1 Matt. 1:21-23Luke 2:111 Tim. 2:5
2 1 Cor. 1:30

Q & A 19 

Q. How do you come to know this? 

A. The holy gospel tells me. 

God began to reveal the gospel already in Paradise;
later God proclaimed it 

by the holy patriarchs and prophets

and foreshadowed it 

by the sacrifices and other ceremonies of the law;

and finally God fulfilled it 

through his own beloved Son.

1 Gen. 3:15
2 Gen. 22:1849:10
3 Isa. 53Jer. 23:5-6Mic. 7:18-20Acts 10:43Heb. 1:1-2
4 Lev. 1-7John 5:46Heb. 10:1-10
5 Rom. 10:4Gal. 4:4-5Col. 2:17