65-72. If their humble lot prevented the development of their best qualities, it also limited their opportunity for doing wrong. It prevented them from becoming tyrannical, from telling what is false, from having to conceal their feelings of shame, and from accepting the flattery which poets too often bestow upon their proud and wealthy patrons.
70. ingenuous. Without artifice, frank, open-hearted.
73. This line is adjectival to the pronoun they implied in their.
madding. Maddening, distracting.
76. tenour. Course.
78. still. Always, in all cases.
81. unlettered. Uneducated.
87. the warm precincts of the cheerful day. The warm bright earth.
precincts. Limits, boundaries.
88. nor cast. Without casting.