Much wisdom often goes with fewer words.

Volume and understanding often run in opposite directions. Saying something briefly requires knowing which parts can go, and that knowledge only arrives after you have thought the matter through. Length is frequently a way of covering ground you have not settled, in the hope that the listener will assemble the point on your behalf. It is also a way of avoiding commitment to any single claim.

Before your next explanation, write down the one sentence you most want understood. Say that first, then stop and let the other person ask. What they ask will teach you more than the paragraph you had planned.