How do emcees remeber ALL of their lyrics for live shows

[Ghost In The 'Lac]

I mean say youve made albums for 10 years or more, you gotta be a memory God to be able to draw everyword at will for a live show or whatever. I f anyones ever wrote ryhmes or got a rhymes book youll realise that its impossible to remember anythin exactly thats more than 48 hours old.

Ive listeneed to Cuban Linx/Illmatic/ Ironman 1000's of times, but if you said to me ok - "Start reciting all the verses from Halftime" or "say back all the lyrics from Criminology" i wouldnt even be able to remember the first line without recaping

...And i stopped smokin weed 3 years ago...