Talking about men stumbling.......There is NO scripture in the Bible that says God has predestinated anyone to heaven or to hell. It is a Calvinist fairy tail.
Watch out, he is stumbling all over the place, Romans 10:32-33.
With your statement above, I would say you are the one stumbling over that precious stone of God's sovereignty of doing all things after the counsel of his holy will. The reason why you are doing so is God has not made known unto the mystery of his will by giving you eyes to see and a heart willing to submit to his testimony of what is truth. In your natural condition your heart is too proud to humle itself as a little child to God's witness of the truth.Romans 9:15-22~ For he saith to Moses, I will have mercy on whom I will have mercy, and I will have compassion on whom I will have compassion. So then it is not of him that willeth, nor of him that runneth, but of God that sheweth mercy. For the scripture saith unto Pharaoh, Even for this same purpose have I raised thee up, that I might shew my power in thee, and that my name might be declared throughout all the earth. Therefore hath he mercy on whom he will have mercy, and whom he will he hardeneth. Thou wilt say then unto me, Why doth he yet find fault? For who hath resisted his will? Nay but, O man, who art thou that repliest against God? Shall the thing formed say to him that formed it, Why hast thou made me thus? Hath not the potter power over the clay, of the same lump to make one vessel unto honour, and another unto dishonour? What if God, willing to shew his wrath, and to make his power known, endured with much longsuffering the vessels of wrath fitted to destruction: And that he might make known the riches of his glory on the vessels of mercy, which he had afore prepared unto glory,
I could spend a few posts on Romans 9:15-22, yet unless you are willing to discuss these scriptures I will forbear at the moment.Ephesians 1:6-8~"To the praise of the glory of his grace, wherein he hath made us accepted in the beloved. In whom we have redemption through his blood, the forgiveness of sins, according to the riches of his grace; Wherein he hath abounded toward us in all wisdom and prudence; Having made known unto us the mystery of his will, according to his good pleasure which he hath purposed in himself:"
I will say a word or two.
God without question has mercy upon whom he will~he could have never created and would have been perfectly content not doing so. Yet he purpose to do so for some reasons always mentioned above. He knew that he alone was immutable and could not be tempted with evil ~ not so with created spirits and flesh and blood. So, God elected some and left others to themselves. If you do not like the thought of God doing this, then sir you have a major problem with the scriptures and its Author. Not a good place to put yourself in~your wheels of your chariot will soon come off and fear will fill your heart beyond what you can even begin to imagine.
When the scriptures said therefore hath he mercy on whom he will have mercy, and whom he hardeneth~God hardened Pharaoh's heart not by working in Pharaoh heart to make it hard, he did so by just leaving Pharaoh to himself and he his heart naturally was harden. Much like he is doing toward you at the moment. Selah.