Shiva Purana
हेतूपदेशगम्यं यत्तत्परोक्षं प्रचक्षते ॥ अपरोक्षं पुनः श्रेष्ठादनुष्ठानाद्भविष्यति ॥ ९९ ॥
What is acquired by reasoning and instructions is the indirect knowledge. The direct knowledge results from the practice of rites.
english translation
hetUpadezagamyaM yattatparokSaM pracakSate ॥ aparokSaM punaH zreSThAdanuSThAnAdbhaviSyati ॥ 99 ॥
hk transliteration by Sanscript