This design was inspired by David Sampiano's life motto called "All Heart." David has a passion for training and teaching others self defense. When he trains people for the first time, he pushes them to their limit to the point where it transcends their mind, and that's where people want to quit. He pushes them a little bit more to the point where they have nothing else - just their bare heart. Running on fumes giving everything they got; what they're functioning on is their heart. If you don't get to the point where it's all your heart, then you're not giving it your all. This is a lifestyle that doesn't just apply to training, but we can do this on a daily basis - on the physical, financial, mental, emotional, and spiritual.
https://www.youtube.com/watch?v=8vjMG27INXo&t=9s
Here is a video interview with David so you can really see how he has practiced and still practices "All Heart" in his life. I hope that you are inspired by his story and every time you wear this shirt, you are wearing the victory of his life and you are reminded that you can operate out of "All Heart" and have victory in every area of your life.