Piling oaths onto a promise is like painting gold over cracked wood. The loud words are meant to cover a heart that does not quite trust itself, and the polish is the flaw. A plain yes that truly means yes needs no decoration at all.
When the tongue promises more than the inner self will keep, the two drift apart and a person becomes double. Letting each small word match the state behind it closes that gap and makes speech honest again. And the One who listens sits closer than any heaven a person might swear by, already knowing what the oath is trying to prove.