This proverb says that a person who is wise will make a decision and stand by it: in this case, it's written in the masculine, but it could apply to a woman as well. It means the wise man (or woman) is decisive; he or she does not hesitate nor is the wise person filled with self-doubt. Such a person gathers the facts and then makes an intelligent decision.
vacillate:
She has a tendency to vacillate.
His tendency to vacillate makes him a poor leader.
The cast of Vacillate - 2011 includes: Amanda Dow as Dawn Dylan John Seaton as Rob Emily Sandifer as Fay Brett Zimmerman as Man on Couch
I always vacillate when I have to choose between curly or straight fries.
Yes. People who vacillate are often poor leaders.
She'll vacillate between the two options and have difficulty making a decision.
Vacillate - to waver in opinion or mind; be indecisive or irresoluteSentence:Her mood vacillated between hope and despair.
Three
vacillate "It's not unusual to vacillate about the 'good's and 'bad's of such a big decision"
vacillating
totter or waver