Running with the Mind of Meditation: Lessons for Training Body and Mind

I'm currently reading this amazing book 'Running with the Mind of Meditation: Lessons for Training Body and Mind' I won't try explain it as I won't do it justice but I will share an excerpt from the book.

"The difference between the mind and the body is that no one is surprised to get winded while running to catch the bus. Nobody gets mad at themselves, saying, “I can’t believe I can’t run 26.2 miles!” However, when we become overwhelmed by longer hours at work, more e-mails, or more parenting duties, we become irritable, moody, and unhappy. It doesn’t occur to us that our mind is out of shape. We put more stress on ourselves because we assume we should just be able to handle it all. We should not be surprised when we can’t, for we have not built the base of the mind."

Mipham, Sakyong (2012-04-10). Running with the Mind of Meditation: Lessons for Training Body and Mind (pp. 24-25). Random House, Inc.. Kindle Edition.