The Prophet Isaiah in Isaiah chapter 53, the great redemption chapter, says this in Isaiah 53:7 about Jesus’ Substitutionary Sacrifice on the Cross for us, “As a lamb to slaughter, as a sheep before his shearers is dumb, He opened not His mouth.” Why did He suffer in silence? Yes, He was a Perfect Sacrifice but keep in mind this is the great redemption substitution chapter. He suffered in silence as our Substitute so we don’t have to be silent.
We are to follow His example in suffering things we are exposed to living in a Fallen world (1 Peter 2:19-23; John 16:33) but not for what He Substituted. We don’t have to suffer from sin, sickness, satan, or the curse; as our Substitute He suffered in silence to redeem us from all of that. When we face things He suffered for as our Substitute, we can speak the truths of our redemption from it in faith. Psalm 107:1-2 says, O give thanks unto the Lord, for he is good: for his mercy endureth for ever. 2 Let the redeemed of the Lord say so, whom he hath redeemed from the hand of the enemy.”
Was it really the intent of God? Yes, in the New Testament we are called new creations in Christ ( 2 Corinthians 5:17) and it is said of this new creation in 2 Corinthians 4:13, “We having the same spirit of faith, according as it is written, I believed, and therefore have I spoken; we also believe, and therefore speak.” We are to speak what we believe which is one of the main attributes of how having faith in God works (Mark 11:22, 23). He suffered in silence so we can boldly say things revealed in His Word Hebrews 13:5, 6. We do not have to suffer in silence but we can speak what we believe.