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Dravyasamgraha
is from the association of pure qualities. These four kinds of meditation are divided into two classes, good and evil or auspicious and inauspicious. The former (i.e, the painful and the cruel) are called inauspicious, as these two lead to the influx of inauspicious karmas. The latter are called auspicious, as they are capable of destroying karmas.
Jain, S.A., Reality, p. 267.
Ācārya Umasvami’s Tattvārthasūtra आज्ञापायविपाकसंस्थानविचयाय धर्म्यम् ॥
(9-36) The contemplation of objects of revelation, misfortune or calamity, fruition of karmas, and the structure of the universe, is virtuous concentration.
Ācārya Pujyapada’s Sarvārthasiddhi It is not always possible to ascertain realities such as space by logical analysis, owing to lack of preceptors, keen intelligence, rise of karmas or the intricate nature of reality. Then one believes in such subtle categories as space on the authority of the word of Jina, since the Tīrthařkaras do not preach untruth. On ascertaining reality, the holy person employs logic in bringing home the truth to others in order to propagate the truth revealed by the Lord. The misbelievers like the bornblind are averse to the teachings of the Omniscient Lord, and drift farther and farther away from the right path owing to ignorance. Thus the absence, loss or disappearance of the true path is deliberated upon. Or the self deliberates on how the (vast majority of the) living beings will escape from the cycle of worldly existence caused by wrong faith, knowledge and conduct. The other two terms are self-evident and need no explanation. The ten moral virtues have been explained.
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