I am confused about this concept

I am confused about this concept, this thing I can't describe,

Cannot grasp the idea of being rich in family life.

My heart organ seems to beat to fear and only pain

No response from love or joy, yet this rhythm still remains.

This heart is a strange thing, the body's strongest muscle,

Yet when confronted by love it turns to stone and crumbles.

To be able to grasp this concept is a difficult thing to learn,

Do I dare give it a try or allow this heart to burn.