The phrase "to touch the sky" means to reach a high point or achieve something great. It is often used figuratively to describe an accomplishment that is considered exceptional, impressive, or unattainable for most people. The expression comes from the idea of reaching up and grazing one's fingers against the vast expanse of the sky, which seems almost out of reach. In this sense, "to touch the sky" means to achieve a goal that is considered extraordinary or difficult to attain.