Nowadays, most people use password managers (hopefully). However, there are still some passwords that you need to memorize, like master password (for a password manager), phone lock, wifi password, etc.
Security wise, can passphrase reach the strength of a good password without getting so long that it defeats the purpose of even using it?
Use diceware to generate a nice long nonsense passphrase, and use that for your password manager master password. Keep it written down somewhere until you are sure you’ve memorized it.