 Feinberg earned his Bachelor of Arts degree in English from the University of California at Los Angeles, his Master of Theology degree (1972) in systematic theology from Trinity, and his Master of Arts (1971) and Doctor of Philosophy (1979) degrees from the University of Chicago.Feinberg lives in Vernon Hills, Illinois, with his wife Patricia, with whom he has three children.His brother Paul David (1938 - 2004) also taught Systematic Theology and Philosophy of Religion at Trinity Evangelical Divinity School for thirty years.