The brick wall wasn't meant to represent any given challenge or obstacle in our lives, but more so, the environment and often, the situations we find ourselves in. While our decisions in the now effect where in our environment we will end up, can we really say they change our environment completely? With so many variables, so many other people influencing the world, it's important to realize it isn't just MY world. I am not the only one with impact. I'm not saying I'm power-less, just simply, I'm not in control.
The ant attempting to take down a brick wall wasn't meant to be an analogy on how we face challenges in our lives, but more so, an analogy on how difficult and hopeless it would be to attempt to control all realms of our environment. And I find, that is often what these so-called motivational quotes tend to suggest. Absolute control. And that's just not realistic. No matter how inspiring it may sound.