心知肚明

心 = 乚 + 丶 : Marie Curie (xi) uses a shovel (乚) to dig a hole in front of the encampment ((e)n1). She wants to bury her heart (心). To the side are three petal leaves (丶), with which she wants to cover it afterwards.

知 = 口 + 矢 : Mnemonic symbol: Francis Bacon is attributed to have stated "scientia potentia est", "knowledge is power". I'll thus represent 知 by Francis Bacon. Francis Bacon (知) and James II of England (zh) are playing darts (矢) in front of the space station (Ø1). Because they lack a dart board they just use a mandarin (口).

肚 = 土 + 月 : The moon (月) made tripe out of doggy dog (du) and now his belly (肚) hurts. He has to spend the rest of the day in the space station's bathroom (Ø4) pulling a heap of dirt (土) out of his belly.

明 = 日 + 月 : A searchlight. Together with the moon, Marilyn Monroe is looking for the sun just inside the engine's kitchen. To make the search easier they use a searchlight.

明 = 日 + 月 : A searchlight. Together with the moon, Marilyn Monroe is looking for the sun just inside the engine's kitchen. To make the search easier they use a searchlight.