Prudence fights by the gates of the city. There are boats on the sea, a danger coming. They stand their ground. Their shield is large and solid, but they bear no blade. They seek to protect, not shed blood. They guard the gate, but they will not offer their body to blows. Yet they advance. Slowly, one step after another, they push the assailants back. They take no useless risk, this is about protecting their city, not playing the hero. The torches are lit, there is much life inside the city, support for this unyielding soldier, and home to protect.
Possible meanings : Knowing what your resources are and how to use them wisely. Not wasting energy. Resisting peer pressure. Staying strong in a difficult situation. Making slow progress.