Approve not of him that commends all you say.
Franklin cautions against placing too much trust in someone who agrees with everything one says. Constant approval may appear supportive, but it can also indicate flattery, avoidance of disagreement or an unwillingness to offer an independent judgement. A person who never challenges another’s views may therefore be less useful as a friend or adviser than someone prepared to disagree when necessary.
The saying emphasises the value of honest criticism and independent thought. Genuine respect does not require unquestioning agreement, and constructive disagreement can expose errors, test assumptions and improve decisions. Franklin’s warning is therefore as much about the listener as the flatterer: people should resist the comfort of surrounding themselves only with those who confirm their opinions. The broader lesson is that trustworthy relationships depend on candour as well as support, and that sincere disagreement can be a stronger sign of respect than automatic praise.