Awoke at four this morning. (Yes. There is a four in the morning.) Took the dog out, and was blessed with the sound of a whippoorwill calling in the predawn. It took me back to my Ozark childhood. Although at that time whippoorwills sang when evening was nigh.
I don't know which is more evocative of memories, scents or sounds. Surely the smell of honeysuckle or elderberry can take me back to my youth, but the mournful (or is it hopeful) sound of whippoorwills calling challenge from the forest do the same. And in the dark, i can imagine with dewey-eyed memory that I am once again that blissfully ignorant and innocent boy.
Take time to observe the small miracles. It puts good things in your memory bank and enriches you so.