Srimad Bhagavatam — Ekadasha Skandha, Shloka 30
Guṇa-vibhāga: The Three Modes and the Path Beyond Them
द्रव्यं देश: फलं कालो ज्ञानं कर्म च कारक: । श्रद्धावस्थाकृतिर्निष्ठा त्रैगुण्य: सर्व एव हि ॥ ३० ॥
dravyaṁ deśaḥ phalaṁ kālo jñānaṁ karma ca kārakaḥ śraddhāvasthākṛtir niṣṭhā trai-guṇyaḥ sarva eva hi
物质、处所、行为之果、时间、知识、工作、行作者、信心（śraddhā）、意识状态、生命种类以及死后归趣——这一切确然皆依物质自然的三德而立。
FAQs
This verse states that everything—from our environment (place, time) to inner factors (knowledge, faith, determination) and even actions and results—is conditioned by sattva, rajas, and tamas.
Kṛṣṇa teaches Uddhava how material conditioning works so that Uddhava can recognize the modes operating within and around him, and thereby progress toward transcendence through devotion and right understanding.
Observe which mode is shaping your choices—clarity and balance (sattva), restlessness and ambition (rajas), or inertia and confusion (tamas)—and deliberately cultivate sattvic habits while practicing bhakti to rise beyond all three.