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Use "heartedness" in a sentence
"Evidence perhaps, that even with the most advanced and sustainably-minded undertakings, a bit of whimsy and light-heartedness is good for the soul and home."
"The goldfinch has the advantage of the titmouse in several respects, but he lacks that sprightliness, that exceeding light-heartedness, which is the chickadee's most endearing characteristic."
"Unreserved children of sincerity, by the very open-heartedness which is one great cause of their commanding power, and contagiously diffuses every zealous affection originating in their nobility of nature -- by this grown to excess, made negligent of instinctive self-defence, and heedless of misconstruction, or overcome by importunate and clinging temptations -- to what charges have they not been exposed from that proneness to disparaging judgments so common in little minds!"