Just your standard dinner time conversation:

DS2: (Making his toy excavator dig in his dinner) I think excavator is an omnivore.

Me: You mean it eats meat and plants? I guess it metaphorically eats dirt, which might contain both.

DS: No! It digs and scrapes dirt, not eats it. It digs with its teeth, Mummy. Eats is a metaphor.

What is to give light must endure burning.