Who said "A man is only as good as his word."?

This quote is attributed to Spock.

A man is only as good as his word. - Spock

"A man is only as good as his word."

Spock

"Logic is the beginning of wisdom, not the end."

"I have been, and always shall be, your friend."

"The needs of the many outweigh the needs of the few."

"Insufficient data for meaningful answer."