What idioms with hearts are there?

Ten thousand arrows pierce the heart,

A child's heart,

Obsessed with ghosts,

Well-meaning,

Mentally,

Don't be distracted,

Be careful,

Duplicity,

Diligent and lonely,

Sorrow is more terrible than death,

However, I feel the harmonious heartbeat of the sacred unicorn.

A heart of stone,

Heartache,

Satisfied,

People are not old,

Tacit understanding,

Depressed,

Broad-minded and fat,

Clever,

Inner peace,

Lack of human heart, snake swallowing elephant,

Come to your senses,

Have a heart,

Soul-stirring,

Yes,

Refresh my mind,

Heart failure,

Expand one's mind.

~~~~~~~~~~~~