Roosevelt argues that behaviour can teach more effectively than instruction alone. People often learn by observing how others act, particularly when words and conduct are consistent. An example makes an idea concrete: qualities such as responsibility, honesty or perseverance become easier to understand when they are demonstrated in practice rather than merely described.

The quotation also carries a broader implication for parents, teachers, leaders and others whose behaviour may influence those around them. Their actions can establish expectations and communicate values even when no formal lesson is intended. This does not mean that explanation or instruction is unnecessary, but it suggests that credibility depends partly on practice. Roosevelt’s point is therefore about the educational force of conduct: what people do can reinforce, clarify or undermine what they say, making personal example an important form of teaching.