The Hebrew word 'KARAH' means digged: opened by piercing. In the surrender of the ear is implied the unquestioning servant obedience of Jesus to
the Father. The ears are taken in the Septuagint as being representative of the whole body (see comments in my book, Hebrews - All-glorious
Saviour).
In His coming into the world the Saviour gave joyful acknowledgement that the body prepared was the means by which the divine will could be
accomplished. It is important for our understanding that we recognise that the writer of the epistle to the Hebrews was "borne along" by the Holy
Spirit (2 Peter 1:21 ). This alone is sufficient reason to use the quotation from the Septuagint as the very words of Jesus "when He came into
the world" (Hebrews 10:5 NKJV). It may be said that the Psalm expresses the poetry of the Holy Spirit, while Hebrews sets forth the
meaning on the lips of the Son of God.
The love slave described in Exodus illustrates the love devotion of Jesus to the Father's command -
This law of servitude reminds us of:
The main thought of the pierced ear as applied to Jesus, is that He gave all in His full surrender to the Father.
These were His words coming into the world. "Thy will be done." (Matthew 26:42 KJV) were His words in going to the death of the cross in
that prepared body. His supreme purpose was to do the Father's will, and that included all other desires. There is much to learn from how Jesus
viewed His prepared human body. His own summary of the purpose of His coming, "Thy will", and the context of Hebrews chapter ten teaches the
once for all sacrifice of Christ. It may seem surprising that here are to be found truths that are relevant to our functioning in body life.
Prayerfully consider the following application concerning our service as members of His spiritual body.
1. A FUNCTIONAL BODY
1.1. OUR LORD HAD A PREPARED HUMAN
BODY
Hebrews 10:5 "Therefore, when He
came into the world, He said: "Sacrifice and offering You did not desire, But a body You have prepared for Me. "
Psalm 40:6 "Sacrifice and offering You
did not desire; My ears You have opened. Burnt offering and sin offering You did not require. "
Exodus 21:5,6 "And if the servant shall
plainly say, I love my master, my wife, and my children; I will not go out free: 6
Then his master shall bring him unto the judges; he shall also bring him to the door, or unto the door post; and his master
shall bore his ear through with an awl; and he shall serve him for ever."

Christ's servanthood (Isaiah 43:10; Luke 22:27; Philippians 2:6-7
). 
Christ's Father-pleasing (John 8:29 ). 
Christ's faithfulness (Hebrews 3:2; Luke 2:49 ). 
Christ's voluntary service (Philippians 2:6-7; Matthew 20:28
). 
Christ's inseparableness (John 10:30 ).
Psalm 40:8 "I delight to do Your will, O
my God, ..."