It is often asked by those who don’t believe in Jesus, “Why can’t we see God?” The answer is that if God allowed us to see him, we would indeed choose to love and worship him, but it would be by force. Out of fear of Hell we would love and worship God, and that is not what God wants. God wants people to choose to love and worship him of their own free will.
So how is God to preserve free will, and at the same time, make it possible for people to know him? God’s system is this, he proves his existence through the creation, and he proves his specific identity through his word. This means everyone knows a God exists when they look at the world, but they don’t have to come to Jesus if they don’t want to. They can choose not to read the New Testament, they can choose not to spiritually seek Jesus, they can choose to go their own way – even choosing to deny the existence of a God at all.
Romans 10:17 says, “So faith comes from hearing, and hearing by the word of Christ.” And John 8:31-32 tells us, “So Jesus was saying to those Jews who had believed Him, “If you continue in My word, then you are truly disciples of Mine; and you will know the truth, and the truth will make you free.” So God has given his word to us in such a way, that if we study it and live it out, we will know that it is true. This is not accomplished by our own abilities, but is a work of God. And God is even more gracious, as Jesus said in John 15:26-27, “When the Helper comes, whom I will send to you from the Father, that is the Spirit of truth who proceeds from the Father, He will testify about Me, and you will testify also, because you have been with Me from the beginning.” So every time someone hears the Gospel, the Holy Spirit testifies to them that it is the truth.
But again, God does all this in such a way that he is not forcing belief on the sinner. We have the free will to reject the Holy Spirit’s testimony and refuse to read and live by God’s word. Thus God makes it possible for us to have a voluntary relationship with him, to choose to love and worship him of our own free will.