How do we know all of God's children are taught by Him?

In Isaiah 54:13, God promises that all His children will be taught by Him, indicating a certain outcome in His sovereign grace. Jesus echoed this in John 6:45, stating that everyone who hears and learns from the Father comes to Him. This underscores the teaching work of God through the Holy Spirit and His gospel witnesses. The promise of divine teaching provides assurance that those chosen by God will not fail to understand His will and purpose, leading them to genuine faith in Christ.