to be stupid / to cheat or deceive / me or I (modest)
愚
=
心
+
禺
:
禺狨王 (禺) gives Yu the Great (yu) his heart (心) in the space station's kitchen (Ø2). Yu the Great is very moved and just as she is about to take it 禺狨王 snaps it away, exclaims that it is just an April Fools' (愚) joke and calls Yu the Great out on how dumb (愚) she is.
昧
=
日
+
未
:
Mahatma Gandhi (m) wants to give the kids of an orphanage the sun (日) as a Christmas present, but he wants to keep it secret, so he asks Ai Weiwei (未) to conceal (昧) the sun for him in the Eiffel Tower's bathroom (ei4). Naturally, with the sun hidden, it gets quite dark (昧).
not to have / no / none / not / to lack / un- / -less
无
=
一
+
𠂇
+
乚
:
Mnemonic symbol: the philosopher Diogenes, who has nothing and wants nothing.
无
=
一
+
𠂇
+
乚
:
Just inside the space station's entrance, Diogenes is annoyed by Willy Walrus, who's playing his flute. Diogenes just wants a peaceful time without being disturbed, so he cuts the flute into pieces with a pair of scissors, and threatens to beat Willy Walrus with a shovel should he annoy Diogenes again.
Mnemonic symbol: 無爲, wu2 wei2, the state of non-doing after having attained complete harmony with the Tao.
Willy Walrus (w) has attained Wu Wei (無) just inside the space station's entrance (Ø2), while from the outside it may seem like he is napping.
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).