You think that if a man works at his wood in the carpenter's shop, then he's doing all that is necessary." "Wood?
Of course a carpenter has to work with wood.

Do you want to be a stonemason?
Think, stones are harder than wood." "But they give fire when struck together.

Wood gives no sparks, nor would the Nazarenes yield any sparks, even if lightning struck them.
They are like earth and damp straw.

They are incapable of enthusiasm: they are only capable of languid irritation.

But you'll not build a kingdom of heaven with irritation.