That's it. I don't intentionally memorise anything. Never could. I realised that path was not for me as a six-year old with a key part in the Nativity who remembered some of their lines but none in the right order. When it comes to my work, though, I'm like an encyclopaedia because I meaningfully engage with the same content so often that it sticks. (At least, I think that's what you're saying, minus the Nativity part.)