Do not seek explanation on matters of the heart. No words can exactly decode them all. No books can contain every reason that it carries.
To ask how it feels and what it wants are next to impossible. More than the deeps of words, to understand the heart is to wait and see how how it acts and reacts.
You will know what it wants by the fruits of it actions. Whether smiles, tears or apathies, you will know its desires but the actions that it utters.
The heart is home to our conscience. Words may deny us of many realities, but the heart is the keeper of them all.
You read it by the actions it made because it is impossible for one to make a heart smile while tears flow in pain.