The "choosing" that God has done, before the foundation of the world, is that His children, the ones who received His free gift of salvation by grace, through faith, should be holy and blameless before Him in love. God foreknows, of course, all who will receive His free gift of salvation. But this does not necessarily mean that He orchestrates events in our lives to lead us to that point. But just as Romans 8:28 says that All things work together for good, to them that love God and are the called according to His purpose. In the same way, God causes various people, places & events in our lives to bring us to a place where we can hear the Gospel, and thus receive faith to believe Him for salvation, if indeed that is our choice. Depending on the individual, he or she may have several chances to be saved. Once we are saved, it is in God's plan that we be holy & blameless before Him in love. If we are not saved, and we keep on rejecting God's salvation until we die, then it is God's plan that we separated from Him in eternity.