Poetic Puzzle

Just a quick intro...this is my fusion of a riddle in a poem and the answer is something everyone is familiar with. I always love for people to guess at it, so read it carefully and give it a shot....Who Or What Am I??? Poetic Puzzle # 1 I Can Take You To The Highest Point Or I Can Take You Down Fill You With Such Great Desire I Can Make You Smile Or Frown I Am Heavy Like The Ore Of Metal Yet Lighter Than A Feather I Can Stop Within A Moments Time Or Go On And On Forever I Can Give Your Life Sweet Harmony Or Fill It With Despair I Can Fill Your Heart Your Mind Your Soul Or Just The Space Of Air You Cannot See Me Come Or Go But You'll Know When I'm Around If You Listen Very Close For Me You Can Hear My Every Sound Now Some Of You Have Figured Out My Every Rhyme And Reason For I Will Always Be Around Through Each And Every Season Who Or What Am I???