Astanga Hrudaya
घनीभूतमिवाकाशमाकाशमिव यो घनम् । अमूर्तमिव मूर्तं च मूर्तं चामूर्तवत्स्थितम् ॥ ३० ॥
Seeing contrasting, abnormal and fearful forms which point towards impending death: He, who sees the sky (surrounding empty space) as a solid body and solid substances (bodies) as the sky (empty space), those (objects) which have form (size, shape etc), as formless, and the formless ones as having form;
english translation
ghanIbhUtamivAkAzamAkAzamiva yo ghanam । amUrtamiva mUrtaM ca mUrtaM cAmUrtavatsthitam ॥ 30 ॥
hk transliteration by Sanscript