1 John 3:16: We know love by this, that He laid down His life for us; and we ought to lay down our lives for the brethren.

Mark 8:34 And He summoned the crowd with His disciples, and said to them, "If anyone wishes to come after Me, he must deny himself, and take up his cross and follow Me.

Luke 9:23 And He was saying to them all, "If anyone wishes to come after Me, he must deny himself, and take up his cross daily and follow Me.

John 15:13 Greater love has no one than this, that one lay down his life for his friends.

Galatians 1:4 who gave Himself for our sins so that He might rescue us from this present evil age, according to the will of our God and Father.

Ephesians 5:1-2 Therefore be imitators of God, as beloved children; and walk in love, just as Christ also loved you and gave Himself up for us, an offering and a sacrifice to God as a fragrant aroma.

I also like the more complex & demanding interpretation/exegesis of "Do this in memory of me". (our whole life becomes a Mass)