When I was doing my BSc in Math, Physics and Chemistry, I was much worried about my lack of understanding of these subjects and their practical application in my everyday life. Don't recollect if I read it somewhere or someone told me or my own - unlikely - epiphany, much later though, that -
=Physics is how of things
This made understanding easy but managed to demotivate me from learning about these subjects further.
=Philosophy, as perhaps Math is, is why of things
=Virtue is concerned with what we do,and honour is concerned with how we do it - Shantaram
=Btw, which is more important - What or How?