यत इच्छति तज्ज्ञातुं कर्तुं वा सेच्छया क्रिया ।
तस्याः पूर्वापरौ भागौ कल्पनीयौ पुरा हि या ॥१९॥
yata icchati tajjñātuṃ kartuṃ vā secchayā kriyā |
tasyāḥ pūrvāparau bhāgau kalpanīyau purā hi yā
Since, through that will, he wills to know that or to do it, this is action; and of it two phases, prior and posterior, must be posited — the one that comes earlier (being will).