Writing with heart is considered the "beating heart" of storytelling, essential for transforming a collection of words into a memorable, moving experience for the reader. It goes beyond merely plotting a story, injecting genuine emotion and personal, authentic feelings that resonate with audiences, making stories relatable and unforgettable. 

Importance of writing with heart in stories:  
Creates Emotional Connection: If the writer does not feel emotion, the reader won’t either. Heartfelt writing acts as a bridge, allowing readers to share the characters' joy, sorrow, or fear, creating a, shared,, empathetic experience. 
Boosts Memorability: Readers are more likely to remember how a story made them feel rather than specific plot details or character names. A heartfelt story leaves a lasting impact long after the last page is turned. 
Enhances Relatability: By infusing raw, personal, or universally human emotions into a story, even fantastic or distant scenarios become believable. It turns characters into real people, rather than just vessels for the plot. 
Overcomes "Flat" Writing: Without emotion, stories often feel dull or formulaic. Heartfelt writing adds depth, tension, and stakes that compel the reader to keep turning the pages. 
Fosters Authenticity: Writing from the heart involves using personal experiences, including vulnerabilities and things that scare or disturb the writer, which allows the narrative to feel honest and genuine. 
Develops Stronger Characters: Characters with emotional depth, who grapple with internal struggles and desires, allow readers to empathize, sympathize, or root for them, which is vital for keeping them engaged.
Helps in Understanding the "Why": Understanding the emotional core (the "heart") helps a writer keep the story focused, avoiding unnecessary plotlines and ensuring the narrative. 

Tips for writing with heart:  
Write What Moves You: Focus on emotions or memories that actually resonate with you. 
Use Sensory Details: Ground emotions in physical sensations (e.g., a racing heart, a lump in the throat) rather than just stating the emotion. 
Dig into the "Why": Understand why a character wants something to make it matter to the reader. 
"Never Name an Emotion": Instead of saying a character is "sad," show it through actions, subtext, and dialogue. 
Be Vulnerable: Be willing to share true feelings and experiences, even if they make you uncomfortable. 

2 hours ago, drpaladin said:

The heart has long been thought of as the center of human emotion. In two days millions of cards, texts, and emails will be exchanged expressing heartfelt wishes with hearts.

And the winner is? :Drum roll: Hallmark!

Just the facts:

HEARTFELT Definition & Meaning - Merriam-Webster

HEARTFELT Synonyms: 28 Similar and Opposite Words | Merriam-Webster Thesaurus