Astanga Hrudaya
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द्रव्यमूर्ध्वगमं तत्र प्रायोऽग्निपवनोत्कटम्। अधोगामि च भूयिष्ठं भूमितोयगुणाधिकम्॥११॥
Properties of Dravyas- Fire (Agni) and Pavana (air) predominant substances generally have the property of moving upwards. Bhumi (earth) and Toya (water) dominant substances generally have the property of moving downwards
english translation
dravyamUrdhvagamaM tatra prAyo'gnipavanotkaTam। adhogAmi ca bhUyiSThaM bhUmitoyaguNAdhikam॥11॥
hk transliteration by Sanscriptइति द्रव्यम् रसान् भेदैरुत्तरत्रोपदेक्ष्यते। वीर्यं पुनर्वदन्त्येके गुरु स्निग्धं हिमं मृदु॥१२॥
Veerya (potency) :- Guru (Heaviness) and Laghu (light to digest) Snigdha (unctuous, oily) and Rooksha (dryness) Hima (cold) and Ushna (hot) Mrdu (soft) and Teekshna (piercing, strong)
english translation
iti dravyam rasAn bhedairuttaratropadekSyate। vIryaM punarvadantyeke guru snigdhaM himaM mRdu॥12॥
hk transliteration by Sanscriptलघु रूक्षोष्णतीक्ष्णं च तदेवं मतमष्टधा। चरकस्त्वाह वीर्यं तत् क्रियते येन या क्रिया॥१३॥
Master Charaka says that Virya is that property, through which drug action is made possible. No drug action is possible without Veerya and all actions are possible only by the Virya 13. Some authors opine that there are 8 types of Veerya (potency of an herb/medicinal substance).
english translation
laghu rUkSoSNatIkSNaM ca tadevaM matamaSTadhA। carakastvAha vIryaM tat kriyate yena yA kriyA॥13॥
hk transliteration by Sanscriptनावीर्यं कुरुते किञ्चित्सर्वा वीर्यकृता हि सा। गुर्वादिष्वेव वीर्याख्या तेनान्वर्थेति वर्ण्यते॥१४॥
Those who designated Guru (Heaviness) etc. eight qualities as Veerya, do so by direct implication. Out of 20 qualities, these 8 qualities are predominantly seen in any substance, these 8 qualities are stronger than the rest qualities,
english translation
nAvIryaM kurute kiJcitsarvA vIryakRtA hi sA। gurvAdiSveva vIryAkhyA tenAnvartheti varNyate॥14॥
hk transliteration by Sanscriptसमग्रगुणसारेषु शक्त्युत्कर्षविवर्तिषु। व्यवहाराय मुख्यत्वाद्बह्वग्रग्रहणादपि॥१५॥
are important in day - to - day routine, applicable to majority of substances being considered first in scientific procedures. Hence, these 8 have been given importance.
english translation
samagraguNasAreSu zaktyutkarSavivartiSu। vyavahArAya mukhyatvAdbahvagragrahaNAdapi॥15॥
hk transliteration by Sanscript