It's like you've been invited out for dinner. You can choose not to go, but if you stay home, you don't get the dinner.
What if you are not hungery?
Sorry, but the Cross of Christ is not like dinner and the gospel ain't Rev 3:20.
Here's a hint: the gospel has a name that is exactly 5 words. And the gospel can be expressed in exactly 3 words.
BTW, using your analogy that unbelief is like not choosing to go for dinner, isn't this sin paid for? Why then should this hinder anybodies ultimate glorification more than any other sin?
Your analogy is better than you think:
God's word says that only the Elect get invited (read John 6)
The question is can you turn down an invitation from God if it is His wish that you attend?
If your answer is yes, it would appear you are greater than your host, in that you are able to thwart God's desire.
Salvation isn't determined by the guests, but by God; it's His party. And He's known who was going to sit at the table with Him from before time began.