"from (the bottom of|) {one's} heart"의 정의 및 의미

What is the origin of the idiom "from one's heart" and when to use it?

The idiom "from one's heart" originated from the belief that emotions and genuine feelings originate from the heart, symbolizing the innermost core of a person's being. It signifies expressing or acting upon sentiments, intentions, or words that are sincere, heartfelt, and authentic. The expression is often used to emphasize the idea that what is communicated or done originates from a place of deep emotion, honesty, and sincerity.