For memorising, it’s a lot of rote learning that works for me. I read each quote aloud three times each and write them out three times each as well. I’ve also recorded myself reciting them so I don’t need to read them aloud all the time - in that case, I listen to the recording as I follow along the typed list of my quotes.
I don’t have time to write responses to every single short answer question or essay question that exists, so I type them and in doing so, I end up typing out most of my quotes repeatedly since questions are similar. By seeing how the quotes are applied, I gradually memorise them.
Alternatively, you could try to find a memorable association between the source of the quote (i.e. the verse) and the content of the quote. For example, I remember 1 Corinthians 13:5-7 because it’s the first four odd numbers in order, then I sort of know it’s about love and remember, “[Love] does not dishonour [...] it always protects.”