I apologize in advance for the language, but that aside, I thought this was great.
"Every noble impulse, every unselfish expression of love; every brave suffering for the right; every surrender of self to something higher than self; every loyalty to an ideal; every unselfish devotion to principle; every helpfulness to humanity; every act of self-control; every fine courage of the soul, undefeated by pretense or policy, but by being, doing, and living of good for the very good’s sake—that is spirituality." -David O. McKay
For we wrestle not against flesh and blood, but against principalities, against powers, against the rulers of the darkness of this world, against spiritual wickedness in high places. Ephesians 6:12