Jupiter is the great benefic. Wherever Jupiter lies it generally brings prosperity, growth, expansion, good fortune, spirituality, and knowledge. 
Jupiter represents good karma, generosity, philosophy, faith based practices, preaching, and tradition. Jupiter is the type of teachers that we are drawn to and the teachers that we will find. Those with a strong Jupiter may find themselves keeping higher learning and philosophy close to their hearts. They love to constantly learn and to immediately teach what they've learned to others. Those with a weak Jupiter may find themselves running out of luck, experiencing melancholy, keeping information to themselves, and turned off by organized religion/spirituality. 
Jupiter can also represent over indulgence! Wherever Jupiter lies, it can expand the qualities and characteristics of that house and the sign it's in. Jupiter rules over the liver, gull bladder, thighs, knees, spleen, ears, and fat... be wary of sweets!
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