Actors learn to memorize long lines and passages.
Have you ever heard proverbs and sayings that you liked, but never bothered to commit them to your memory?
Like new vocabulary words, to incorporate a new saying to your repertory of picturesque speech, it really doesn't take that much time or trouble at all.
To illustrate a point or to make a subject entertaining, anecdotal material is often helpful whether it is of your own creation or from others.
To get in the frame of mind to memorize sayings, it can help to create some for yourself first to prime the mental pump so to speak.
Think for 60 seconds and contrive 2 sayings of your own originality, and write them down.
For example: Those who know the least know it the loudest.
The future isn't what it used to be.
Now memorize the following 3 sayings and their authors in the next 5 minutes and show yourself how simple it is.
When you do this, give your recitations of the passages a singing intonation to throw the information to the right brain.
For most right-handed people, it can also improve your auditory recall and recitation by shifting your eyes to the left (the opposite is often true with left-handed people).
An eye movement to the left seems to activate the brain's auditory memory area.
The great end to life is not knowledge, but action.
Thomas Henry Huxley Man is what he believes.
Anton Chekhov When I was younger, I could remember anything, whether it happened or not.
Mark Twain