Śrīmad-Bhāgavatam · Text 11.20.17
Who is speaking and story frame
नृदेहमाद्यं सुलभं सुदुर्लभं
प्लवं सुकल्पं गुरुकर्णधारम् ।
मयानुकूलेन नभस्वतेरितं
पुमान् भवाब्धिं न तरेत् स आत्महा ॥ १७ ॥
nṛ-deham ādyaṁ su-labhaṁ su-durlabhaṁ
plavaṁ su-kalpaṁ guru-karṇadhāram
mayānukūlena nabhasvateritaṁ
pumān bhavābdhiṁ na taret sa ātma-hā
The human body, which can award all benefit in life, is automatically obtained by the laws of nature, although it is a very rare achievement. This human body can be compared to a perfectly constructed boat having the spiritual master as the captain and the instructions of the Personality of Godhead as favorable winds impelling it on its course. Considering all these advantages, a human being who does not utilize his human life to cross the ocean of material existence must be considered the killer of his own soul.
Read the purport on Vedabase.ioFrom Canto 10, chapter 14 onward, the translation and purports were completed by Śrīla Prabhupāda's disciples after his departure, and published by the Bhaktivedanta Book Trust.