The regulated use of the tongue holds the key to true wisdom...

Rarely is a prudent person questioned.

Knowing when to speak and when not to speak is the mark of true wisdom. All of us could use better judgement as to when we say things and how we say them. Part of developing this sought-after wisdom (which I have certainly not attained as of yet) is forethought as to what one is saying, not only as to what is being said but as to how the auditors will receive the remark.

Also, while speaking, one must be careful not to become consumed with what one is saying or how it is being received by the listeners. This also can be handled by preparing what one says before one speaks. If one becomes preoccupied with what is being said whilst speaking there is little chance that the audience will comprehend the intended message.

Those who speak without much verbal pause ("um", "uh", etc.) are often seen as more articulate and in a way more intelligent. Once again, this is handled by forethought and rehearsal (whether mental or verbal).

"I have often regretted speaking, never remaining silent." If the mind is drawing a blank as to what to say, say nothing at all. "Better to be silent and seen as intelligent then to open one's mouth and remove all doubt."

I'll follow my own advice now.