How can purely physical things and processes have any meaning at all? Ontological naturalism excludes both final and formal causes. Those exclusions make any form of intentionality impossible.
Secondly a life has meaning in the same way symbolic representations do. Words and pictures point to things other than themselves. Thus a person's life has meaning to the extent that it serves as a sign and symbol of something they value. The difference between atheists and believers is that atheists can only refer to proximate values whereas believers identify with transcendent or eternal values.
Secondly a life has meaning in the same way symbolic representations do. Words and pictures point to things other than themselves. Thus a person's life has meaning to the extent that it serves as a sign and symbol of something they value. The difference between atheists and believers is that atheists can only refer to proximate values whereas believers identify with transcendent or eternal values.