Here are some quotes about time passing that I found:

- "Time flies over us, but leaves its shadow behind." - Nathaniel Hawthorne
- "Time is an illusion." - Albert Einstein
- "Lost wealth may be replaced by industry, lost knowledge by study, lost health by temperance or medicine, but lost time is gone forever." - Samuel Smiles
- "Time spent for temporary happiness like movie or outing or weekend on a beach is all synthetic; with shelf life of a day or two. Work for your bigger dreams that should last for whole life. Then movie and beach would seem more interesting, realizing that you have done something." - Amit Kalantri

I hope these quotes help you in some way.