George R.R. Martin explained his views on religion in the storyverse of the A Song of Ice and Fire novels: there is no one true religion, and as in real life, it is unconfirmed if any of the deities in these religions really exists.
A PhD, short for Doctor of Philosophy, may help you secure a position as a college or university professor, a researcher in a government or industrial laboratory, a consultant, or an independent practitioner. The best way to prepare for your defense is to know your dissertation and your research inside and out. 2  At a successful defense, you'll need to present yourself and your work well both orally and in writing to earn recognition as a PhD candidate and a researcher.
I work in a neuroscience lab that does a lot of work on sleep, I don't personally do it, but I've absorbed quite a lot over the years (plus, it's hard to get a PhD in neuroscience without picking up a bit).