知过改过

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).

过 = 寸 + 辶 : Gitta Giraffe is trying out her new gladiator sandals in the observatory's bathroom. She's even able to cross a puddle of water with them by just walking on the water, so thumbs up for her!

改 = 己 + 攵 : Guy Fawkes rose to power in the airplane and the first thing he wants to do is to change the throne. He used a butcher's hook to scratch the jewels out of the golden throne. Now he uses a sledgehammer to change the throne into a new form, that is, a pile of garbage.