+1 Regardless of what your beliefs are, I think a good way to approach this is to ground yourself in what those beliefs have taught you, and how they inform your actions - not the dogma/ritual associated with them (church/temple). I will admit, this is a big benefit to a secular worldview - no mess/strings attached when your time becomes limited. Values are based solely on Humanist ethics, so no time is required for outside "practice" or whatever, and nobody judging you for failing to adhere to some arbitrary set of rituals. But, for those who have been brought up in a religious faith, the social and community aspects of that faith may present the biggest challenges - perhaps it is the lack of these components that are worrying to practicing members of religious groups? Maybe graduate school could actually be seen as an opportunity to develop your own, more personal set of beliefs/values, based in those you held previously but acquired in absence of the rituals and community they originally were based in. It could be a great time to develop spiritually on your own terms. You know, make lemonade out of lemons sort of thing?