The natural man, before he is born again by the grace of God, will not, and indeed can not trust in God according to 1 Cor 2:14. God will not give man eternal life by depending upon himself in it being man's choice. Dan 4:35 - God has his way with the army of heaven and among the inhabitants of the earth, and none can stay his hand. If God wants to save you eternally, he will, even if you drag your hills in the dirt. The freedom God gives to man is to make choices about his life here on earth, but not on choosing to be eternally saved, that's by the grace of God only.