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| [[Image:lighterstill.jpg]][[Image:Heart_nebula.jpg|right|frame|<center>[[Heart Nebula]]</center>]] | | [[Image:lighterstill.jpg]][[Image:Heart_nebula.jpg|right|frame|<center>[[Heart Nebula]]</center>]] |
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− | The '''heart''' has long been used as a [[symbols|symbol]] to refer to the [[spiritual]], [[emotion]]al, [[moral]], and in the past also [[intellectual]] core of a [[human being]]. As the heart was once widely believed to be the seat of the human [[mind]], the word ''heart'' continues to be used poetically to refer to the [[soul]], and stylized depictions of hearts are extremely prevalent symbols representing love. | + | The '''heart''' has long been used as a [[symbols|symbol]] to refer to the [[spiritual]], [[emotion]]al, [[moral]], and in the past also [[intellectual]] core of a [[human being]]. As the heart was once widely believed to be the seat of the human [[mind]], the word ''heart'' continues to be used poetically to refer to the [[soul]], and stylized depictions of hearts are extremely prevalent [[symbols]] representing [[love]]. |
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| + | <center>For lessons on the [[topic]] of the '''''Heart''''', follow [https://nordan.daynal.org/wiki/index.php?title=Category:Heart this link].</center> |
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| ==As metaphor== | | ==As metaphor== |
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| The equation (x^2+y^2-1)^3=x^2*y^3 yields a heart shaped graph. | | The equation (x^2+y^2-1)^3=x^2*y^3 yields a heart shaped graph. |
| + | ==See also== |
| + | [[Hearth]] |
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| ==References== | | ==References== |
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− | *[http://www.slate.com/id/2159800/?GT1=9129 The Shape of My Heart: Where did the ubiquitous Valentine's symbol come from?] by Keelin McDonell, [[Slate (magazine)|Slate.com]]. | + | *[https://www.slate.com/id/2159800/?GT1=9129 The Shape of My Heart: Where did the ubiquitous Valentine's symbol come from?] by Keelin McDonell, [[Slate (magazine)|Slate.com]]. |
− | *[http://www.heartsymbol.com www.heartsymbol.com: The Heart Symbol - Origin, History And Significance] by Prof. [[Armin Dietz]] | + | *[https://www.heartsymbol.com www.heartsymbol.com: The Heart Symbol - Origin, History And Significance] by Prof. [[Armin Dietz]] |
| *The shape of the heart, by Pierre Vinken, Amsterdam 2000. | | *The shape of the heart, by Pierre Vinken, Amsterdam 2000. |
| *How the heart was held in medieval art, by Pierre Vinken, The Lancet, 358, 22, december 2001, 2155-2157. | | *How the heart was held in medieval art, by Pierre Vinken, The Lancet, 358, 22, december 2001, 2155-2157. |