tatah (ततः, tataḥ) = (adv. from tatas (ततस्, tatas)) then; by that
krita (कृत, kṛta) = (nom. sg. f.) fulfilled; accomplished
arthana (अर्थान, arthāna) = (iic. from artha (आर्थ, ārtha)) purpose
parinama (परिणाम, pariṇāma) = (iic.) change
krama (क्रम, krama) = (iic.) change; succession; process
samaptih (समाप्तिः, samāptiḥ) = (nom. sg. f. from samapti (समाप्ति, samāpti)) terminate; end
gunanam (गुणानाम्, guṇānām) = (g. pl. m. from guna (गुण, guṇa)) gunas; the three basic constituents of matter; all matter

Human beings as mice

Imagine for a moment that we are mice on a treadmill, just in front of which a piece of cheese is suspended and which we try to reach by continuously running on our treadmill. We’re able to make the treadmill go ever faster, but fail to get any closer to the cheese. Ultimately we get worn out, without having attained our goal of reaching the cheese. We human beings are often trapped on such a treadmill, in that we believe that we’ll be happy if we achieve a specific goal. But having attained what we yearned for, we soon begin yearning for something else. The world’s mutability keeps us in a state of perpetual motion – a state in which we are constantly trying to attain one goal or another, or avoid something. But unfortunately, this approach to life never leads to inner contentment and happiness. Kaivalya (कैवल्य, Kaivalya) is the state of liberation from constant change, seeking and avoidance. In this state, figuratively speaking we step to the side of the treadmill and obtain the cheese without any difficulty.