How do we know the eternal sonship of Jesus is true?

The doctrine of the eternal sonship of Jesus is affirmed through several biblical passages, notably Colossians 1:15-17. Here, Jesus is declared to be the 'image of the invisible God' and 'the firstborn of every creature,' indicating His preeminence and eternal existence. The text asserts that by Him all things were created, which highlights His active role in creation and reinforces the belief that He exists outside of time as the Son of God. Despite our inability to fully grasp this mystery, we embrace it by faith as a core element of our theological understanding of Christ.