If anything restores confidence that truth is within our grasp, it is that we can divide and conquer. Although “real” is sometimes equated with “fundamental,” each of the multiple levels of description in science has an equal claim to be considered real. Therefore, even if things vanish at the roots of nature, we are perfectly entitled to think of things in daily life. Even if quantum mechanics is mystifying, we can build a solid understanding of the world on it.
Source: Scientific American Sep.2020
I understand "divide" here as "cut into small parts (and then solve them one by one/or "conquer them all together")." Am I on the right track?