Yoga Sūtra Chapter Three verse 3

tat-eva-artha-mātra-nirbhāsaṃ svarūpa-śūnyam-iva samādhiḥ ||3||

As if empty of one’s own character,
the purpose alone shines forth;
that indeed is integration.

tat - that, thiseva - thusartha - purposemātrā - only; measure, quantity, sum, size, durationnirbhāsā - shines forthsvarūpa - own characterśūnya - emptyiva - as ifsamādhi - putting together; communion; combining; integration

Commentaries and Reflections

TKV Desikachar:

It is not enough to realise that there is somewhere to go, you must also be really interested in taking the step. In Samādhi there is an understanding. Something not based on your memories, something that transcends your memories.

Prajña comes only in Samādhi.