sattvaḿ rajas tama iti
guṇāḥ prakṛti-sambhavāḥ
nibadhnanti mahā-bāho
dehe dehinam avyayam

sattvam — the mode of goodness; rajaḥ — the mode of passion; tamaḥ — the mode of ignorance; iti — thus; guṇāḥ — the qualities; prakṛti — material nature; sambhavāḥ — produced of; nibadhnanti — do condition; mahā-bāho — O mighty-armed one; dehe — in this body; dehinam — the living entity; avyayam — eternal.

Material nature consists of three modes — goodness, passion and ignorance. When the eternal living entity comes in contact with nature, O mighty-armed Arjuna, he becomes conditioned by these modes.