Too Much Explaining

If a matter requires a lot of explanation, it is likely to be
abstruse or unconvincing, for if it were clear and persuasive, it would not need such explanation…

A lengthy explanation might also point to a lack
of confidence in your listener’s intelligence or
quickness in comprehension, or may reveal your lack of
confidence in what you are saying!

The thing which convinces is not a great amount of explanation, but the power of the idea.

Too much explanation may induce boredom, especially if your listener has already understood your meaning. Too much explanation wastes his time and puts pressure on his nerves…

Therefore it is best that your words be brief and persuasive
and clearly expressed in balanced phrases; nothing more
and nothing less.

—H.H. Pope Shenouda III, Experiences in Life