Doing changes the parameters of thinking. Imagine you are climbing a hill and the summit is invisible. This is because the slope is convex and gettlng less steep as you go higher. So actually the going is getting easier. But the summit is hidden by the bulge of the slope ahead. Only by keeping going can you get to the top. By stopping and thinking you may conclude 'it's not worth it' as the summit is invisible. Your thinking is limited by the experience of plodding ever upward and not seeing your goal. But once you are at the summit all kinds of different thoughts are possible, thoughts you could naver have had by imagining yourself at the summit. Doing has changed the parameters of thinking.
Lots of things seem impossible when you think about them because the parameters are inappropriate. But you cannot 'think' these obstructive parameters away. You have, instead, to get going and do something. By doing something you move ahead and the view changes. More things seem possible. The more things you do the more things seem possible.