After assuming a material form, he (the individual soul) is subjected to the three material modes of nature and acts accordingly to continue his existence in the material world

Expressions researched:
"After assuming a material form, he is subjected to the three material modes of nature and acts accordingly to continue his existence in the material world" |"the individual soul"

Krsna, The Supreme Personality of Godhead

When there is cosmic manifestation, the jīvātmā, or the individual soul, appears in the creation in different forms, according to his previous fruitive activities, and due to his long forgetfulness of real existence, he identifies himself with a particular form awarded to him by the laws of material nature. After assuming a material form, he is subjected to the three material modes of nature and acts accordingly to continue his existence in the material world.

Krsna Book 87:

The personified Vedas continued by saying that the Supersoul and the individual soul, or Paramātmā and jīvātmā, cannot be equal in any circumstance, although both of them sit within the same body, like two birds sitting in the same tree. As declared in the Vedas, these two birds, although sitting as friends, are not equal. One is simply a witness. This bird is the Paramātmā, or Supersoul. And the other bird is eating the fruit of the tree. That is the jīvātmā. When there is cosmic manifestation, the jīvātmā, or the individual soul, appears in the creation in different forms, according to his previous fruitive activities, and due to his long forgetfulness of real existence, he identifies himself with a particular form awarded to him by the laws of material nature. After assuming a material form, he is subjected to the three material modes of nature and acts accordingly to continue his existence in the material world. While he is enwrapped in such ignorance, his natural opulences become almost extinct. The opulences of the Supersoul, or the Supreme Personality of Godhead, however, are not diminished, although He appears within this material world. He maintains all opulences and perfections in full while keeping Himself apart from all the tribulations of this material world. The conditioned soul becomes enwrapped in the material world, whereas the Supersoul, or the Supreme Personality of Godhead, leaves it without being affected, just as a snake sheds his skin. The distinction between the Supersoul and the conditioned individual soul is that the Supersoul, or the Supreme Personality of Godhead, maintains His natural opulences, known as ṣaḍ-aiśvarya, aṣṭa-siddhi and aṣṭa-guṇa.