the symbol of koi
According to the Japanese legend if a koi fish succeeds in climbing the falls at a point called "The Dragon Gate" on the Yellow River it would be transformed into a dragon and based on that legend, it became a symbol of aspiration and advancement.
More generally, the Japanese associate koi (carp) with perseverance in adversity and strength of purpose. Because of its strength and determination to overcome obstacles, it stands for courage and the ability to attain high goals.
Others say it means good fortune and luck.
my body gets tired, but my heart and soul does not.
be like a koi fish, become an endless movement of strength.
photo from: www.drawger.com/