For me this phrase makes a lot of sense, it's like we do an exam where we have to solve problems, we try to concentrate and we dedicate ourselves to work to try to clear all the doubts. At first everything seems difficult but in the measures we observe everything begins to clarify. I think the key is in the way we see things. It's like the stone in the road: the artist made a sculpture, the tired one served him to sit down, the floppy one stumbled...