Sin and grace, absence and presence, tragedy and comedy, they divide the world between them and where they meet head on, the Gospel happens. - Frederick Buechner

I not only have my secrets, I am my secrets. And you are yours. Our secrets are human secrets, and our trusting each other enough to share them with each other has much to do with the secret of what it means to be human.

When you remember me, it means that you have carried something of who I am with you, that I have left some mark of who I am on who you are. It means that you can summon me back to your mind even though countless years and miles may stand between us. It means that if we meet again, you will know me. It means that even after I die, you can still see my face and hear my voice and speak to me in your heart.
For as long as you remember me, I am never entirely lost. When I'm feeling most ghost-like, it is your remembering me that helps remind me that I actually exist. When I'm feeling sad, it's my consolation. When I'm feeling happy, it's part of why I feel that way.
If you forget me, one of the ways I remember who I am will be gone. If you forget, part of who I am will be gone.

It is not objective proof of God's existence that we want but, whether we use religious language for it or not, the experience of God's presence.