Franklin presents distrust and caution as habits that can help protect people from harm. Distrust does not necessarily mean assuming that everyone is dishonest; it can mean withholding confidence until there is enough evidence to justify it. Caution complements this by encouraging people to consider risks before acting.

The saying therefore treats security as something partly created through careful judgement rather than simply received through good fortune. People who question appearances, verify claims and think about possible consequences may be less vulnerable to deception, loss or avoidable mistakes. Franklin’s formulation is deliberately strong, but its broader point is practical rather than cynical. Excessive suspicion can itself be harmful, yet unquestioning trust can leave people exposed. The quotation favours a measured scepticism in which confidence is earned and decisions are made with attention to uncertainty and risk.