To understand the concept of emotions, you must first understand where they come from. To do this, you have to check your memory.
Try to remember what you were doing seven years ago on Tuesday, June 23rd. You will not have any particular memory, unless you experienced a significant event on that day. You will only remember that specific date if your spouse left you, a tragic accident occurred, you had your first kiss, your child was born or some kind of memorable event took place.