Whether a man has a free will or not is a great topic of debate in philosophy and science.
No matter what kind of position one takes, it is clear that it is the multitude of miscellaneous things that drives each of us. When we make a choice, many different things in our neural circuit compete for influence and dominance, and the result might surprise even the agent himself.
Life is thus like surfing waves. The surge of the unknown from the unconscious is not unknown for all of us. Living is full of surprises, as previously unknown motifs and motives suddenly drive us to pathways of living hitherto undreamed of.
When we think of the variety of influences that form us, the goal that one pursues throughout life is like a dim light seen in the distance. It is not something that dominates your whole system. Your existence is rather swayed to and fro in an unpredictable manner, you keep surfing the waves of the multitude, and from time to time, you look up at the dark sky and see the faint light still barely visible in the great northern void.