Kierkegaard is making a radical distinction between intellectual clarity and existential commitment—and he's right that they're opposites, not partners. Most of us believe that understanding precedes action, that we need complete information before we can move forward, but he's pointing out that this is often just elaborate procrastination. A person agonizing over which career to choose needs not another book or assessment; they need to pick one and discover what choosing actually means through the living of it. The clarity you seek doesn't arrive in your armchair—it arrives only when your feet are already moving.