On the bass the more tinny, sharp sounds spike certain emotions and the softer, smoother tones induce others.
On the piano, soft chords and sharp notes are like the heart and the brain, and you have to choose which to follow at different times in your life.
Singing gets everything out, it's the instrument that makes you cry, laugh hysterically or start screaming! You're expressing what you feel inside you in tone and texture and the lyrics come from whichever song you've chosen, which often comes naturally if you already know it.
To me music is something to get lost in; when I'm feeling sad, overjoyed, confused, lost or angry; however I feel it brings me back and makes me feel so much better!