Consider this wooden object.
This is a chair. You say.
But is it? I ask. What makes it so?
This! And you sit upon it.
Ah, I see. But please arise.
I place my tea cup and notebook upon it.
Now, still a chair? Or has it transformed into a table?
I remove them.
Would you please retrieve that book from a high shelf?
You then stand upon the sturdy item.
It has become a stepladder.
What magic is this?
Thus is all.