Tattva Bodha 10

आत्मा तर्हि कः ? सच्चिदानन्दस्वरूपः । सत्किम् ? कालत्रयेऽपि तिष्ठतीति सत् । चित्किम् ? ज्ञानस्वरूपः । आनन्दः कः ? सुखस्वरूपः । एवं सच्चिदानन्दस्वरूपं स्वात्मानं विजानीयात् ।   ātmā tarhi kaḥ ? saccidānandasvarūpaḥ . satkim ? kālatraye’pi tiṣṭhatīti sat . citkim ? jñānasvarūpaḥ . ānandaḥ kaḥ ? sukhasvarūpaḥ . evaṃ saccidānandasvarūpaṃ svātmānaṃ vijānīyāt .   Then what is the self? It is of the nature of existence, consciousness, bliss. What is existence? That which remains unchanged in the three periods of time {past, present and future} is existence. What is consciousness? It is of the nature of absolute knowledge. What is bliss? It is of the nature of absolute happiness. Thus one should know oneself to be of the nature of existence-consciousness-bliss.