I found so many great sources while doing research for the Adventure of Happiness. Here are a few of the  quotes and excerpts I included in the chapter on Legs, which focuses on the bias towards being active.

An active mind cannot exist in an inactive body.  – George S. Patton, Jr

All growth depends upon activity. There is no development physically or intellectually without effort, and effort means work.  – Calvin Coolidge

The Center for Disease Control lists inactivity as the third leading cause of preventable death in the United States. – Robb Wolf, The Paleo Solution, 146.

I want to do what is good, but I don’t. I don’t want to do what is wrong, but I do it anyway. But if I do what I don’t want to do, I am not really the one doing wrong; it is sin living in me that does it. – Romans 7.19-20, NLT

God’s plan is for us to spend our lives doing whatever unlocks our tear ducts, makes our throats deep with song, keeps the gales of laughter surging in our souls and turns our feet to dancing. What next? – Leonard Sweet, The Well-Played Life, 86.

The number one complaint at the doctor’s office today is fatigue. Everyone is tired, and it’s becoming an epidemic. Our bodies are telling us something is wrong, but we’re too busy to listen. Energy is like cash…it is a currency that flows. It needs to move through us in a cycle of abundance. – Pedram Shojai, The Urban Monk, 50.

It is exercise alone that supports the spirits and keeps the mind in vigor. – Cicero

The lazy do not roast any game, but the diligent feed on the riches of the hunt. In the way of righteousness there is life; along that path is immortality. – Proverbs 12.27-28, NIV

When you walk, you won’t be held back; when you run, you won’t stumble. – Proverbs 4.12, NLT

Your body will glow with health, your very bones will vibrate with life! – Proverbs 3.8, MSG

Your legs are not giving out. Your head is giving up. Keep going. – Unknown

The race is not to the swift, Nor the battle to the strong, Nor bread to the wise, Nor riches to men of understanding, Nor favor to men of skill; But time and chance happen to them all. – Ecclesiastes 9.11, NKJV

Physical fitness is not only one of the most important keys to a healthy body, it is the basis of dynamic and creative intellectual activity. – John F. Kennedy

Remember that bodily exercise, when it is well ordered, as I have said, is also prayer by means of which you can please God our Lord. – Saint Ignatius

Take care of your body. It’s the only place you have to live. – Jim Rohn

You can get the whole chapter on Legs in The Adventure of Happiness here.