Verse 14

आरम्भे दृष्टिमापात्य तदौन्मुख्यं हि गम्यते ।व्रजतो मुष्टितां पाणेः पूर्वः कम्पस्तदेक्ष्यते ॥ १४ ॥

In plain words

if one lets one's gaze fall on it at the beginning, its aunmukhya is indeed understood. When a hand is closing into a fist, a first trembling is seen in it.