Hayanaratna · by Balabhadra
Chapter 1 · Planets, Signs, Year Entry
ग्रहराशिस्वरूपवर्षप्रवेशाद्यानयनाधिकारः
उक्तंच वसिष्ठेन ।"अध्येतव्यं ब्राह्मणैरेव तस्माज्ज्योतिःशास्त्रं पुण्यमेतद्रहस्यम् ॥एतद्बुद्ध्वा सम्यगाप्नोति यस्मादर्थं धर्मं मोक्षमग्र्यं यशश्चे"ति ।
And Vasishtha has said: 'So this jyotisha (astrology) science must be studied by Brahmins alone. It is holy and secret. For by knowing it well, one gains wealth, dharma, the highest freedom, and fame.'
Simple meaning: Vasishtha: astrology is a holy science for Brahmins; it brings wealth, right living, freedom and fame.
ननु यवनाचार्य्यप्रणीतेक्कवालादिपारसीशब्दात्मकस्य ताजिकशास्त्रस्याध्यापनमेव तावदनभिहितम् ॥ अध्ययनं तु दूरादपास्तमेव ॥
An objection: the Tajika uses Persian words, so teaching and studying it seem not allowed.
उक्तं च स्मृतौ ॥
The Smriti rule: never speak the foreign tongue, even when close to the end.
तन्मूलभूतत्वात्सदमरसिंहादिशास्त्रस्याप्यध्ययनमनुचितं मूलाशुद्ध्या सर्वमशुद्धमितिन्यायात् ॥
The objection goes on: Samarasimha's work grows from the Yavana work, so it too seems unfit.