Guru aaya lagan mein updesh doosron ko de, akad badi rakhe wo naak pe makkhi na baithne de.
Jupiter came in the Ascendant, he gives sermons to others; he keeps great arrogance, he doesn't even let a fly sit on his nose.
While Jupiter in the 1st house is a blessing, it carries a massive risk of intellectual arrogance.
Dr. Sharma explains that this person naturally loves to give advice and sermons ("updesh doosron ko de") because they possess genuine wisdom. However, this often morphs into a severe superiority complex.
The *Nishaniya* (symptom) of a corrupted Jupiter here is extreme stubbornness and ego ("akad badi rakhe"). They become so easily offended and touchy that they "won't even let a fly sit on their nose" (a Hindi idiom for being hyper-sensitive to criticism). This arrogance blocks their spiritual progress and alienates their loved ones.