It's difficult to understand his inmost feelings.

Shouhei drinks beer every night.

This kanji has the left 'heart' radical (立心偏).

Aishinka is my best friend.

When I looked into her eyes, the phrase 'the eyes are the window to the soul' came to mind.

When I look into her eyes, it's like I can see her heart. That's because the eyes are the window to the soul.

Every morning, he has a habit of reciting the Heart Sutra.

The doctor used an electrocardiograph to check the condition of my heart.

He is trying to understand the universe from the perspective of panpsychism.

He has strong patriotic feelings.