Nobody would argue that this world is perfect. It seems that most people are working at making it a better world with the understanding that we can't make it perfect.
To make a perfect world would take something superhuman. Something like maybe, a Perfect God. A perfect world run by a Perfect God would only be inhabited by perfect people.
Can you be perfect and therefore qualify? Me neither.
Then how could I possibly get in? GRACE!
The Grace of a Perfect God bestowing undeserved blessings upon me.
What does He want in return for such a wonderful gift? Just believe that He exists, that He sent His Son Jesus Christ to die as payment for your sin, and to TRUST Jesus to cloth you in His Righteousness so that you can be perfect in the eyes of The Perfect God.