I was reminded today of an email conversation I had years ago with my boss at a little company I used to work with.
How he came to think of this, I don't know, but he wrote me an email (copying another executive, so maybe it was a lunchtime discussion I was supposed to resolve), but anyway, he wanted to know if you can go to heaven by repenting a minute before you die after living badly during the rest of your life.
Well... yes, I replied, but...
I think that every time you shut your ears to God and turn away when he calls, you harden your heart a little bit. Day after day and year after year of ignoring God can build up a callous heart so that at that moment just before you die you may have no desire whatsoever to repent.
I suggested he not wait for that point. Though I haven't seen him in a long time, I'm still hoping he doesn't wait that long. And if you're reading this and haven't asked God to forgive you, I also hope you don't wait that long.
How to become a Christian