The Catechism in Questions & Answers

734. Who is the greatest example of willingness to sacrifice?

Jesus Christ is the greatest example of willingness to sacrifice. Out of love for mankind, He gave His life as an offering and a sacrifice.
Even though no other sacrifice can be compared to the sacrifice of the Lord, His willingness to sacrifice is nevertheless an example that calls upon us to follow Him.

“Therefore be imitators of God as dear children. And walk in love, as Christ also has loved us and given Himself for us, an offering and a sacrifice...”
Ephesians 5: 1-2