Giving man the power to make a genuine, independent choice does not diminish God's control over His universe. Being omnipotent and omniscient, God certainly could so arrange circumstances as to keep man's rebellion from frustrating His purposes. In fact, God could even use man's free will to help fulfill His own plans and thereby be even more glorified. God's grand design from the foundation of the world to bestow upon man the Gift of His love precludes any ability to force that Gift upon any of His creatures. Both love and gifts of any kind must be received .
Force perverts the transaction.
The fact that God cannot fail, lie, sin, change or deny Himself does not in the least diminish His sovereignty. Nor is He any the less sovereign because He cannot force anyone to love Him or to receive the gift of eternal life through Jesus Christ. They must be given freely from God's heart without any reason other than love, mercy and grace. Wonderfully, in His sovereign grace, God has so constituted man and has so designed a gift that man may receive it voluntarily by an act of his will and respond in love to God's love. Without a free will man could not receive the gift of eternal life, thus God could not give it to him.