http://www.swamij.com/yoga-sutras-10104.htm#1.3
(More discussion and graphics at this link)
1.3 Then the Seer abides in Itself, resting in its own True Nature, which is called Self-realization.(tada drashtuh svarupe avasthanam)
tada = then, at that time; at the time of concentration and meditation
drashtuh = the seer's, of the soul, witness, Atman, Self; from the root drsh, which means to see (It is significant to note that Patanjali is not trying to define who is the seer, or the nature of that seer. This is left to be answered or resolved in direct experience.)
svarupe = in its own nature, own form or essence; (sva = own; rupa = form)
avasthanam = stability, settling, remaining, being in a state, resting, standing, lying, abiding; the root stha means to stand
http://www.swamij.com/yoga-sutras.htm
http://www.swamij.com/