I remember not too long ago when a friend of mine lost his father to cancer, he talked of his only consolation being that at least his dad and mom would be together.

But it's what he said next that stuck with me. "Neil, it's just me and my sisters. There's no one in front of us now."

I guess what got me thinking of that conversation was hearing that two icons I grew up with --Gregory Peck (searchand David Brinkley (search-- had died. They were both of my parents' generation and like my parents, they're gone now.

It seemed like yesterday that they were vibrant and part of our culture. Then they got old, and were suddenly out of our culture. And then, they were no more, and completely gone from our culture.

It got me thinking about time and how quickly it goes. And about my own life, grandparents, and aunts and uncles, my mother and father. My mother's friends. My father's friends. They were once my world. One by one, they have left this world.

The people who dominated my past, are no longer part of my present. Like my friend, there are very few in front of me.

At least we have Gregory Peck's movies and David Brinkley's books and old news footage. But as time goes on, fewer will care. Fewer still will watch. And another generation will move forward.

It's all about time. What we had and didn't appreciate when we had it. And what we have, and won't appreciate. Until we lose it.

Watch Neil Cavuto's Common Sense weekdays at 4 p.m. ET on Your World with Cavuto. 

Neil Cavuto serves as senior vice president, anchor and managing editor for both FOX News Channel (FNC) and FOX Business Network (FBN). He is anchor of FNC's Your World with Cavuto - the number one rated cable news program for the 4 p.m. timeslot - as well as the FNC Saturday show Cavuto on Business. He also hosts Cavuto on FBN weeknights at 8 p.m. In addition to anchoring daily programs and breaking news specials on FNC and FBN, Cavuto oversees business news content for both networks and FNC's weekend business shows, including Bulls & Bears, Forbes on Fox, and Cashin' In. Click here for more on Neil Cavuto.