In the ministry of Jesus, no one came to Him unless the Holy Spirit drew them. Under the New Covenant, no one comes to Him unless the Blood draws them, according to Ephesians 2:13. The Blood is what's drawing us, and I personally believe that the Blood is drawing us at all times. Our choices affect how we receive the ministry of Jesus' High Priestly ministry that's drawing us, whether we're experiencing it as the remission of our sin, according to Ephesians 1:7, or whether we're experiencing it as judgment with the world and being guilty of the Body and Blood of Christ according to 1Corinthians 11 and Hebrews 10. Romans 9 through 11 and Hebrews 10 through 13 illustrates to me that whether we receive the drawing of Christ's Blood upon our lives as kindness or as severity is based upon what we do, whether we receive or sell the birthright, etc.
Hebrews 6 does illustrate for me a hardened spiritual condition that one can enter into through their own works and decisions to where the Blood won't draw them any more, but they'll be subject to eonian fire. With Acts 13:48, and the instance of Israel as a nation, you're getting into the difference between God's Sovereignty where nations are concerned with regards to how much exertion there is on the part of the Blood of Christ, and the difference between the Great Commission which is to each individual with the commandment to repent and believe the Gospel according to Acts 17, Acts 20 and other passages.
God's Sovereignty in Scripture is expressed with regards to where families live, according to Acts 17, where politics is concerned, according to Romans 13, and with regards to nations, according to Daniel 4. But the individual part of the equation and one's self motivating power with regards to responding to the ministry of reconciliation never seem to be taken away from individuals, otherwise why would Peter have preached to them on the Day of Pentecost for them to save themselves from this wicked generation? Why would Romans 10 have said, that if you, not your nation, but if you believe in your heart that Jesus is Lord and that God raised Him from the dead, and if you confess His Lordship, calling upon Him from a heart that has heard the glad tidings, then you will be saved? Otherwise why would we be told to pursue good works, and that those that aren't fruitful shouldn't eat?
If those things were a simple matter exclusively of God at work within us to will and to do for His good pleasure, then why would St. Paul have devoted between 25% and 50% of his epistles to telling us to get off our blessed assurance, get over it, and go and do something that'll feed some mouths and relieve the afflicted?? We're told to not be conformed to this world, but to be transformed by the renewing of our mind, rather than being told "here's where all of these godly thoughts are miraculously coming into your head from! It's a little scary as God's rebooting your brain and taking over your consciousness without your participation, but it's all for the best..."
Free will, not expressed as self determination, but as self motivation in response to the call of the Gospel is never set aside by a single page of the New Testament.