2.3 विद्याशरीरसत्ता मन्त्ररहस्यम् ॥३॥ vidyā-śarīra-sattā mantra-rahasyam sūtra vidyā-śarīra-sattā — the being whose body is (pure) Knowledge ; mantra-rahasyam — the secret of mantra The being whose body is Pure Knowledge is the secret of mantra.