越俎代庖 — “To exceed one's authority and meddle in others' affairs”

In the legendary history of the Chinese nation, there was an outstanding leader named Tang Yao. Under his leadership, the people lived in peace and prosperity. However, Tang Yao was very humble. When he heard that the recluse Xu You was very capable, he wanted to cede his leadership to Xu You.

Tang Yao said to Xu You, 'If the sun and moon are already out, isn't it meaningless to keep candles lit compared to their brightness? If timely rain has already fallen, isn't it futile to water the crops? If you were to assume leadership, you would certainly govern the world even better. What meaning is there for me to occupy this position? I feel ashamed, please allow me to entrust the world to you.'

Xu You replied, 'You have already governed the world very well. If I were to replace you now, wouldn't I be seeking fame? I now live by my own efforts; what do I need those empty titles for? A wren building its nest in the forest occupies no more than a single branch; a mole drinking from the Yellow River only drinks its fill. What use is the world to me? Let it be. Even if the cook doesn't prepare the sacrificial food, the officiant cannot step over the ritual vessels and take his place in the kitchen to cook.'