81. i.e., these appear and disappear in the course of Time.
82. Literally, the science of Life.
83. This inevitable and broad path is the path of Life. What is said here is that every creature is subject to birth.
84. The first line of this verse refers to the disputed question of whether the body exists independent of life, or the creature exists independent of the body. This is much disputed by Hindu philosophers. The gross body may be dissolved, but the linga sarira (composed of the subtlest elements) exists as a cause for the unborn Soul. This is maintained by many.
85. Param here is explained by Nilakantha as Paramatma. Pay court i.e., seek to obtain and enjoy them.
86. This sacrifice is one in which the performer parts with all his wealth.
87. Vasumati means possessed of wealth (from Vasu and the syllable mat).
88. The Bengal reading chainam in the first line of 31 is better than the Bombay reading chetya, which, Nilakantha explains, means chetanavan bhava.
89. These seven sacrifices were the Agnishtoma, the Atyagnishtoma, the Ukthya, the Shodashi, the Vajapeya, the Atiratra, and the Aptoryama. Each of these required the consecration of the Soma.
90. The expression used is "He caused one umbrella only to be set up." The custom is well-known that none but kings could cause umbrellas to be held over their heads.