In JEHOVAH’s sacrificial system, He’s very clear about what’s acceptable: whatever is presented to Him must be perfect; asking Him to accept a blemish or defect of any kind is an abomination. (De 17:1)
It’s not that God dislikes physical defects in themselves; He has created every living thing exactly as it is and cares for each one. (Ps 145:16) His concern evidently lies in what a sacrifice represents: He accepts an animal sacrifice as a substitute for us, representing an atonement for our sin. (He 9:7) It doesn’t actually take away our sin (He 10:11), it’s a picture of a metaphysical substitute, something He will accept to reconcile us with Himself, something perfect which can suffer instead of us. This substitutionary sacrifice, we must with all diligence find. (He 4:1)
Our sin is entirely unacceptable to God (Ro 3:23); it moves Him to anger and indignation towards us. (Ro 2:8) God designed the sacrificial system to help us recognize this problem, and how He offers to resolve it: we either need Someone Who’s perfect to take our place, to accept our punishment and bear God’s wrath for us, or we must face God ourselves, alone, and be destroyed.
On the Day of judgement, every soul will face Almighty God to answer for their sin, for their crimes against God. (Ro 14:12) On that fateful Day, His face will be so dreadful Earth and Heaven will try to hide. (Re 20:11). We will all endure the indignation of JEHOVAH, one at a time, one way or another. (Mi 7:9)
It’s only in finding a perfect, willing Substitute that we have any hope of surviving that Day. Our selfishness and pride is an abomination to God (Pr 16:5); asking Him to accept us as we are will be no different than offering a blemished animal on His altar here. It can’t end well.
Many, thinking they’ve found a fire escape in Christ, will hear Him say, “Depart from me, you workers of iniquity, for I never knew you” (Mt 7:22), and will face the court of Heaven on their own.
To find shelter in that stormy Day, we must enter into His rest by faith. God is, in fact, offering Himself to be our sacrifice (2Co 5:21); there can be no excuse for neglecting His offer. (Ac 17:31)
The door to the kingdom is open, and it always will be: it will never, ever close (Re 22:17), but Christ warns us to strive to enter, for only those few who love the truth will find Him. (2Th 2:10)