The brain's preferred source of fuel is glucose/carbohydrates. And when you go on a low-carb/high-protein diet, your brain is using low-octane fuel. You'll be a little groggy, a little grumpy.
Jack LaLanneLiving is like training for an athletic event. You have to have goals and challenges; you need to exercise and eat right.
Jack LaLanneIf you're tired and pooped out all the time, do you have love and compassion in your heart for your fellow man? You don't even like yourself!
Jack LaLanneAsk the guys who are doing serious triathlons if there are any limits to what can be done. The limit is right here. You've got to get physically fit between the ears. Muscles don't know anything. They have to be taught.
Jack LaLanneIt's survival of the fittest. You can't have everything perfect, that's impossible, but the fit survive. The fit can handle the impurities in the air and in the water, but the poor people who are sick, it really affects them more.
Jack LaLanneThoughts are things. Negativity is what kills you... It's tough to do, but you've got to work at living, you know? Most people work at dying, but anybody can die; the easiest thing on this earth is to die. But to live takes guts; it takes energy, vitality, it takes thought. . . . We have so many negative influences out there that are pulling us down. . . . You've got to be strong to overcome these adversities . . . that's why I never stop.
Jack LaLanne