It's not a helpful feeling because it doesn't help you get to where you want to go.

It's a feeling that asks you to reflect on the past and actions you should have taken.

Well, we're not in the past at the moment. We're in the present. Also, it does us no good to relive actions we could have, would have, or did do because right now, we get to decide what we can and will do.

If you want to do something worth something,
If you want to set out to change the world,
If you want to start feeling like yourself,
If you are ready to come alive,
Then abandon guilt.

Instead, learn.