The only true wisdom is in knowing you know nothing.

Meaning: An outward container does not establish the quality of what is inside. Look for evidence about the substance rather than relying on packaging, appearance or a reassuring presentation.

Meaning: A request made at a higher level leaves room to reduce it later. The saying describes flexibility in an opening demand, while its advice needs limits: an inflated request can undermine trust or ignore what the other person can reasonably offer.

Meaning: A measure can register one property without recognising the differences that matter for another judgement. Equal weight does not mean equal value; choose evidence suited to the question.

Meaning: Making a wager is easy and does not itself demonstrate knowledge or judgement. The dismissive wording challenges treating willingness to stake something as proof of being right, rather than fairly describing the person making the bet.