We long for past things because we’ve had them before. Yesterday is a point of reference so it is safe to us.”It’s done, I did it”, we say. It provides a sense of accomplishment. Makes us proud and even puts us at ease because we have overcome a frame of time.
Today. We can’t be as confident about today because it is still in progress. There’s nothing to compare it to except yesterday.
Tomorrow is the optimist. It’s always coming and will never be late. Mysterious. Intriguing. Just too darn perfect to be true. Or to be promised.
...but good ol’ yesterday. Gone but never forgotten. Maybe that's why we get stuck there.