St. Thomas Aquinas argued for the existence of god as follows: any object in motion must have been put in motion by another object, which in turn was put in motion by another, which in turn was put in motion by another… Rather than an infinite regress, he postulated God as the “unmoved mover” or the “prime mover” that initiated all motion.
In your life there is a prime mover, choosing what to focus on, integrating what you observe and learn (or choosing not to), making decisions, developing plans, and taking actions toward those plans (or not). This prime mover is responsible for putting your life in motion.
You are the prime mover of your life.