Ex 34:20 "But the firstborn of a donkey you shall redeem with a lamb. And if you will not redeem him, then you shall break his neck.
The Lord said that all the firstborn of every creature belonged to Him. The problem was that the donkey was an unclean animal. It was therefore unacceptable. Without being redeemed, it was facing a sure death.
My friend, we are the donkey here. By creation we belong to God. But because of the Fall, we became sinners that are defiled and are therefore unacceptable to God. Without a sacrifice, without the Lamb of God who takes away the sin of the world, without redemption, we are facing a sure and certain death in the lake of fire.
Don't come to God in yourself and by yourself. Come to Him, trusting in the Lord Jesus Christ and what He did on the cross for you.