What you put inside your brain...its the composer's job. The lyrics writing and the song writers.

One person you heard about its David Foster to that Celine Dion.

https://www.youtube.com/watch?v=pW6fG4rBV_c 

https://www.youtube.com/watch?v=2uve1Qgql2s 

https://www.youtube.com/watch?v=mJEz7T9hyuA 

Making of "My Heart Will Go On"

James Horner and Celine Dion

https://www.youtube.com/watch?v=NFip-yfiy4s