the.com/heartfelt
Emotion so genuine it skipped the brain and filed straight from the chest.
means Describes feelings or expressions that are deeply and sincerely felt, not performed or polite.
from A Middle English mashup of heart and felt, literally meaning felt in the heart, back when emotions were thought to live there rather than in the head.
Heart mythAncients placed thinking and feeling in the heart, not brain.
Greeting card fuelThe adjective entire sympathy-card industries are built upon.
Sincerity testCalling something heartfelt quietly implies most things aren't.