Verse 23

क्षुरधाराप्रमितया धिया परमधीरया ।प्रविचार्यात्मनस्तत्त्वं ततः स्वपदमाविश

In plain words

With an understanding honed fine as a razor's edge, supremely steady, having thoroughly inquired into the truth of the Self — then enter your own true station.