A.
If you do not climb a high mountain, you will not comprehend the highness of the heavens.
B.
Pile up earth to make a mountain and wind and rain will rise up from it.
C.
Blue comes from the indigo plant but is bluer than the plant itself. Ice is made of water but is colder than water.
D.
But unless you pile up little steps, you can never journey a thousand li ; unless you pile up tiny streams, you can never make a river or a sea.