Would you still be spending 8+ hours a day on that work project instead of the dream business you always said you would build? Would you still be putting up with any half-efforts in any area of your life when you know you're putting in 1000%?
What would you do differently today if you knew nothing else mattered but you and yourself tomorrow? It changes a lot, doesn't it? So, why doesn't it today? What's holding you back?