Chandogya Upanishad 7.13.2

7.13.2

sa yaḥ smaraṃ brahmety upāste\ yāvat smarasya gataṃ tatrāsya yathākāmacāro bhavati yaḥ smaraṃ brahmety upāste \
asti bhagavaḥ smarād bhūya iti \
smarād vāva bhūyo 'stīti \
tan me bhagavān bravītv iti \\713.2\

‘He who worships memory as Brahman becomes free to act as he wishes in the sphere within the reach of memory, he who worships memory as Brahman.’ ‘Revered sir, is there anything greater than memory?’ ‘Surely, there is something greater than memory.’ ‘Revered sir, communicate it to me.’