I see a lot of comments all over the place about how a Christian had a plan for his/her life. A plan that s/he was passionate about, and wanted more than anything else. The plan never occurred, and the Christian ends up doing something different with his/her life.
The Christian then claims that the life s/he now has, the one that God planned, is so much better than anything the Christian attempted to do on his/her own.
How does the Christian know this? How could any of us know this unless we experienced both options, and were able to compare them equally? I can understand someone saying, "Based on the evidence I have available, I can conclude that the life I have now is better than the life I thought I wanted." And I can understand someone using "know" in that context. Yet that isn't the context I get when Christians say that the life they have now is better than the one they planned -- rather, this is absolute, 100%, do not pass doubt-Go certainty.
And they can be that certain. Yet I would say these are the same Christians who would turn around and tell atheists that atheists can't make the claim that there is no God, because atheists haven't been to every corner of the universe, or something like that. So if one can't know there isn't a God unless one has examined every microscopic corner of the universe, one can't say that s/he knows God's plans are better than the original idea, as that person hasn't lived both plans.
Note -- I'm talking about people who were passionate about option A, and are now living option B and claim to do so passionately. I'm not talking about someone who's option A was a dead-end job, and option B is the most exciting job imaginable. Then again, I don't think we can say that anyone ever really plans on having a dead-end job, can we.