This is a discussion of what this means and if it is valid claim.You know, a lot of atheist talk is like a lifelong prisoner no longer believing there is anything outside the prison cell. Religion or not I just don't think it is justifiable. I do think it is a worldview and when I point it out atheists tend to get very offended (as if I attacked a sacred belief).
We know the sun rises and sets every day, day in and day out. Assuming only common sense knowledge you would be right to assume that it will always be the case.
Similarly for death. Assuming common sense knowledge you would be right to assume death is the end of life.
But then someone shows that the sun is a ball of energy and is burning up and you realise that one day the sun will not rise (or set). That it is simply a habit of life that you assumed was normal.
To date, the atheist believes death is the end, because of the same reasoning. As soon as someone rises from the dead that satisfies their burden of proof then they will change their view.
But this has two philosophical issues.
1) Humes problem of induction
https://beisecker.faculty.unlv.edu/Cour ... uction.htm
2) The god of the gaps fallacy
In the end the atheist claims about death are simply a gap and they are quick to fill it with nothing. That nothing happens after death.https://rationalwiki.org/wiki/God_of_the_gaps
From rational wiki: God of the gaps (or a divine fallacy) is a logical fallacy that occurs when believers invoke Goddidit (or a variant) in order to account for some natural phenomena that science cannot (at the time of the argument) explain. This concept resembles what systems theorists refer to as an "explanatory principle". "God of the gaps" is a bad argument not only on logical grounds, but on empirical grounds: there is a long history of "gaps" being filled and the remaining gaps for God thus getting smaller and smaller, suggesting "we don't know yet" as an alternative that works better in practice; naturalistic explanations for still-mysterious phenomena always remain possible, especially in the future where research may uncover more information.
So back to my quote.
If you were born inside a locked room and given food and water and air and whatever to survive through a hole then it is possible you might never wonder what is outside the room. That room just happens to be he universe and death is the border to what might be beyond.