Chapter 17Verse 3
Shraddhatraya Vibhaga Yoga
सत्त्वानुरूपा सर्वस्य श्रद्धा भवति भारत। श्रद्धामयोऽयं पुरुषो यो यच्छ्रद्धः स एव सः॥
sattvānurūpā sarvasya śraddhā bhavati bhārata, śraddhā-mayo 'yaṁ puruṣo yo yac-chraddhaḥ sa eva saḥ
Meaning
What you genuinely believe about yourself and the world quietly sets the shape of your life. Krishna puts it plainly: a person is made of their faith, and whatever they put their trust in is what they become. It's worth checking, then, what you've actually placed your faith in.
Reflection
You are made of what you believe. Whatever you put your faith in is what you become.