Is belief in a "higher power" a "spiritual strength"?

Inspired by CaptainHarley’s question and the answers to the “spiritual” portion.

Some of us (myself included) didn’t quite know what to answer for the “spiritual strengths” portion. There was, of course, no definition of “spiritual” in the question, but then, some of us (myself not included) seemed to understand already what the question was asking.

So, what is a “spiritual strength”? Can one have “spiritual” strengths while still maintaining their lack of traditional beliefs? and is relying on a deity a “strength” at all, as referenced by several people who answered “I have faith in ________” to that portion?