Sri Chinmoy: With running, we call it a second wind. After covering one or two miles, if the runner continues, he finds it easier to breathe. When you are exhausted, sometimes you are not actually physically tired. You are mentally tired or emotionally tired. You are not tired, but the mind convinces you that you are tired. But imagination can challenge the mind and win. When you run or do anything, try to exercise your imagination-power.
We weaken ourselves by imagining that we are weak. Again, we can strengthen ourselves by imagining that we are strong. Our imagination has compelled us to think: we cannot do this, we cannot say this. We often use imagination in a wrong direction. Instead of letting imagination take us forward toward our goal, we use it to take us backward.