既来之，则安之

既 = 旡 + 艮 : Mnemonic symbol: the saying 一言既出，驷马难追 means "lit. once said, a team of horses cannot unsay it (idiom); a promise must be kept". Thus, I'll represent this character with a team of four horses.

Joan of Arc made a bet with a team of four horses that she'd be able to chew 20 chewing gums at once. After stuffing ten of them into her mouth she's already chocking, but what has been said cannot be retracted by a team of four horses.

來 = 从 + 木 : Mnemonic symbol: mailwoman. Sir Lancelot (l) is visiting the mailwoman (來) in the airplane's kitchen (ai2). As a gift, he brought a Christmas tree (木) decorated with rubber chicken (从).

来 = 丷 + 未 : Mnemonic symbol: mailwoman. Lancelot (l) is super happy that his inflatable crocodile (丷) and live size Ai Weiwei (未) puppet finally arrived (来). The mailwoman (来) delivered them straight to the kitchen of the airplane (ai2).

之 = 丶 + Z : Mnemonic symbol: Sooo sleepy... "zZz" (the character looks like a "Z"). James II of England (zh) fell asleep in front of the space station (Ø1). He sleeps on a big petal leaf (丶), making loud "zZz" (之) sounds.

则 = 刂 + 贝 : Mnemonic symbol: 武则天 (Wu Zetian), the only female emperor of China in more than four millennia. It makes sense because for sure she wrote many official statements, for which 则 is the classifier.

则 = 刂 + 贝 : Just inside the elevator's kitchen, Zorro found a crab. He already has a kitchen knife in his hand and wants to kill and eat the crab, but Wu Zetian quickly writes an official rule that forbids the eating of crabs, much to Zorro's disappointment.

安 = 女 + 宀 : Albert Einstein prepared an experiment: He invented a new sport and tries it out himself. Using a seat belt, he jumps off anthill's roof. To his surprise, he lands in a graduation cap that Bessie Coleman put there to capture him.