Verse 47

मृष्टे लौल्यमुपादत्ते दुर्भोज्ये याति निःस्पृहम् ।वैरस्यं याति कटुनि स्वयमित्यनुभूयते

In plain words

Toward the delicious it takes on eagerness; toward the hard-to-eat it turns indifferent; toward the bitter it comes to distaste -- and this too is felt to arise of itself.