Every soul has it's own melody.
Dovid Hamelech ( King David) knew the melody of every one's soul. He was a poet and used these tunes as inspiration to write Tehillim (psalms). When Moshiach comes we will each know our own melody.

Sometimes I sit and try not to try. I let it take me over...and sometimes I feel like I'm almost there. If I can just let myself open up, I'll fly.
Open my eyes, open my soul, Find the song within.