What is the central idea in this advice from Branch Rickey to Jackie Robinson?

self-monitoring is in other words holding back your emotions for the better good. usually, people who can't hold their excitement, temper, or any other emotions, need to self-monitor themselves.   lol

d. murder of a son and cooking the son for a feast

procne murdered her son and served him to tereus, her husband and her son's father. she did this out of revenge. tereus raped her sister, philomela, and cut her tongue out to keep her from talking. philomela managed to communicate it to procne and procne sought revenge.

tantalus murdered his son and fed him to the gods because he was angry with the gods. the gods punished him by putting him in a pool of water that evaporates when he tries to drink and having fruit hang just out of his reach.

nature versus humanity!

no, but sometimes i do.