What does every dog is bold on its on doorstep mean?

The phrase "every dog is bold on its own doorstep" suggests that individuals tend to feel more confident and assertive in familiar surroundings or situations where they feel secure. It reflects the idea that people may act bravely or take risks when they are in a comfortable environment, but their behavior may change when they are outside of that space. Essentially, it highlights the influence of context on behavior and confidence.