Does not the Lord want us to come to him the way we were a children? He would not punish little ones the way a severe father and mother would, but he would still bless them with His Word. And isn't that something worth noticing, because it is from Abraham's fatherhood over Isaac that we know that approach doesn't work.
And what about Hagar? Was she not also lovely for having Ishmael? Doesn't his lineage also come from blessed Abraham? Sarah probably didn't mind him, I don't know.
Jesus does say we must come to Him with the heart of a child. He means a child’s trust, honesty, softness, and willingness to learn.
Matthew 18:3
“Assuredly, I say to you, unless you are converted and become as little children, you will by no means enter the kingdom of heaven.”
But Jesus never teaches that coming like a child means we ignore God’s commandments or live without guidance. A child needs teaching, correction, and direction. Jesus Himself teaches, guides, corrects, and warns because He loves.
Revelation 3:19
“As many as I love, I rebuke and chasten.”
God’s discipline is not harsh anger. It is loving correction to bring His children into life, not punishment like an angry parent. Jesus shows the Father’s heart in the story of the prodigal son: the father runs to embrace, restore, and forgive.
Luke 15:20
“But when he was still a great way off, his father saw him and had compassion…”
So yes, Jesus welcomes us with the heart of a child, but a child who listens and follows the Father’s voice.
About Abraham, Isaac, and Hagar:
Abraham was blessed by God, and God kept His promises through Isaac because God chose Isaac as the covenant line.
Genesis 21:12
“For in Isaac your seed shall be called.”
But God also cared for Hagar and Ishmael. When Hagar cried in the wilderness, God heard her, comforted her, promised her a future, and saved the boy’s life.
Genesis 21:17-18
“God has heard the voice of the lad... I will make him a great nation.”
This shows that God is kind to all people connected to Abraham. Ishmael was not chosen for the covenant line, but he was not forgotten or rejected. God blessed him in his own way.
Sarah’s feelings are not the center of the story. God Himself cared for Hagar, saw her suffering, and helped her.
So the truth is simple:
Jesus calls us to come to Him with a childlike heart, trusting and ready to learn.
God’s discipline is loving, not harsh.
The story of Abraham shows that God keeps His covenant through Isaac, yet God also blesses and watches over Hagar and Ishmael. God’s kindness reaches farther than the covenant line, because He hears the cry of every heart.