The realities of life often get eclipsed with sentiment and the resulting weakening of resolve. It is at such moments that truth gets sidelined and a false sense of hopelessness prevails. Arjuna faced a situation like this when he felt overwhelmed at the sight of battle with his own cousins. Krishna reminds him of his duty to uphold the law or dharma. He instructs Arjuna about the reality that underlies all of creation.
mayādhyakṣheṇa prakṛitiḥ sūyate sa-charācharam
hetunānena kaunteya jagad viparivartate
This can be roughly translated to:
Working under my direction, the material energy brings into being all animate and inanimate forms, O son of Kunti. For this reason, the material world undergoes the changes (of creation, maintenance, and dissolution).
– Bhagavad Gita 9.10