Many people I know describe themselves as "spiritual, not religious." I, in fact, describe myself that way. But what does that mean? I believe it is important for each of us to define that for ourselves. What I am noticing as I get older is that the people who have consciously chosen their beliefs and put them into practice are more at peace with themselves than those who haven't yet decided what they are for - they just know they're against organized religion.
Seeking, study and meditation help us overwrite the programming of our childhoods. Simply saying "no" to the past does not prevent it from becoming our default position when the inevitable losses of older age come our way.
Wherever you are on this path - whether you have an answer to the question of what spirituality means or your belief system is still a work in progress - this TED talk will give you plenty to think about.
Cynthia Lair on "How to Cut An Onion"