Bhagavad Gita 18.46

यतः प्रवृत्तिर्भूतानां येन सर्वमिदं ततम्।स्वकर्मणा तमभ्यर्च्य सिद्धिं विन्दति मानवः॥

yataḥ pravṛttirbhūtānāṃ yena sarvamidaṃ tatam |svakarmaṇā tamabhyarcya siddhiṃ vindati mānavaḥ ||

He from whom all the beings have evolved and by whom all this is pervaded, worshipping Him with his own duty, one attains perfection.

One reaches perfection by dedicating their actions to God, Who is the source of all being and fills everything.

Our plain-language meaning of this verse is waiting for scholar review.