All are not friends that speak us fair.

In its archaic wording, “speak us fair” means to address us pleasantly or flatter us. Pleasant, flattering, or agreeable words alone do not prove genuine friendship, loyalty, or goodwill.

The saying advises prudence rather than suspicion of every courteous person: judge relationships by conduct, consistency, and support in difficult circumstances, not solely by reassuring words or polished courtesy.

Use it to warn that charm, compliments, or professed goodwill may mask self-interest or insincerity, while avoiding the implication that kindness itself is untrustworthy.