You're saying God takes away His own sovereignty to give man a free will? Where can we find this in the Bible? (Please don't reference Joshua 24:15. Calvinists believe in having a will, just not a free will.) So we can put aside Romans 8:28-30, Ephesians 1:4-5, 1 Thessalonians 1:4-5 and say "God ain't sovereign anymore. He gave mankind free will. All that predestined stuff, eh, He's just looking into the future." Well, I'm not sure how God in His "sacrificed sovereignty to give man a free will" is able to foresee this "free" will. This Arminian argument never makes sense to me. How can God foresee a free will? And why is Calvinism depressing? Knowledge between free will or no free will doesn't have to affect your satisfaction in life. Also, yes, God does command all to repent. He also commands all not to lie. Just because He commands something doesn't mean we can do it. Remember our nature is corrupted by the love for sin. Repentance is a gift from God and people can only be repentant if he/she is drawn from God (being of the elect) (John 6:65).
The bottom line is we cannot choose God and we are naturally enemies of God. Our nature is too corrupt (Romans 8:7). Therefore, the only way we can be saved is if God draws us to Him. Not through works or anything, it's simply up to God's will. Nobody can come to Jesus unless he is drawn by the Father (John 6:44). Now what does Jesus say about those whom the Father draws? "All that the Father gives me will come to me, and whoever comes to me I will never cast out" (John 6:37). The Lord will "raise them up at the last day" (John 6:44). Those whom are called end up being glorified (Romans 8:28-30). Not drifiting away. Not losing their salvation. Not being abandoned by God. None of that. The called are never forsaken and are glorified in the end.
Therefore, perseverance of the saints is true.