Yoga Sūtra Chapter Four verse 4
निर्माणचित्तान्यस्मितामात्रात् ॥४॥
nirmāṇa-cittāni-asmitā-mātrāt ||4||
Psyches are created only from the sense of ‘I’ am-ness.
nirmāṇa - createdcitta - psyche (the totality of the human mind, conscious and unconscious); mind; heartasmitā - egoity; the sense of 'I' am-nessmātrā - only; measure, quantity, sum, size, duration