Vaisesika Sūtra 4.2.02

प्रत्यक्षाप्रत्यक्षाणां संयोगस्याप्रत्यक्षत्वात् पञ्चात्मकं न विद्यते ॥२॥

The conjunction among visible and invisible is not perceptible, hence, ātman combined with five elements does not come to light.