Reid Carpenter might be 80 years old, but he hasn’t slowed down, and he isn’t planning on it anytime soon. A spiritual grandfather and mentor to Brian, Reid has devoted his life to his home city of Pittsburg. From starting multiple nonprofits, to helping launch Young Life, Reid is a living example of the power of hard work, and how its ripple effect can influence generations.

This is the 4th episode in an 5-part series called Five Marks Summer, celebrating the repackaged publication of Brian’s best-selling book, The Five Marks of a Man. Pre-order the newest edition, or the companion Tactical Guide, at briantome.com/fivemarks and get a complimentary poster with each purchase.