Only the wise know just where predestination ends and free will begins. Meanwhile, you must keep on doing your best, according to your own clearest understanding. you must long for freedom as the drowning man longs for air. Without sincere longing, you will never find God.
That free will was demonstrated in the placing of temptation before man with the command not to eat of the fruit of the tree which would give him a knowledge of good and evil, with the disturbing moral conflict to which that awareness would give rise.
The intuition of free will gives us the truth.
And one who is just of his own free will shall not lack for happiness; and he will never come to utter ruin.
Life is like a game of cards. The hand you are dealt is determinism; the way you play it is free will.