sentences:  The fourth is "Sansathan vichāya dharma dhyāna", when one thinks about the vastness of the universe and the loneliness of the soul, which has had to face the results of its own causes all alone.A few important contemplation themes in Preksha meditation are - Impermanence, Solitariness, Vulnerability.In "pindāstha-dhyāna" one imagines oneself sitting all alone in the middle of a vast ocean of milk on a lotus flower, meditating on the soul.