Why did Lazarus get sick and die according to the Bible?

According to John 11:4, Jesus declared that Lazarus' sickness was not unto death, but for the glory of God, so that the Son of God might be glorified by it. This incident highlights the interconnectedness of the glory of the Father and the Son, as their glory is inseparable. The resurrection later demonstrates the power of God over death and showcases the deity of Christ, ultimately affirming that He has authority over life and death, which leads to a greater understanding of His divine nature.