默誌

默 = 犬 + 黑 : Mahatma Gandhi (m) and the Saint Bernhard dog (犬) are training hard in the observatory's bathroom (o4). They are taking turns of making awful noises on a blackboard (黑), and they train to remain silent (默) instead of screaming out loud.

志 = 士 + 心 : Mnemonic symbol: a sticky note. James II of England (zh) writes down his poems on sticky notes (志) in the space station's bathroom (Ø4). As he reads them to the bachelor (士), the bachelor is really moved by James II of England's ambitions (志) and wants to give James II of England his heart (心).