What is the meaning of don't be too slow if there's only a little rice don't be too shy if there's only a little viand?

The phrase suggests that one should not hesitate or hold back in situations where resources or opportunities are limited. It encourages taking action and making the most of what is available, rather than being overly cautious or timid. Essentially, it conveys a message of seizing the moment and not allowing shyness or fear of scarcity to hinder one's decisions.