ndulge in_.

_Which_ is a relative pronoun, representing _sin or folly_, in the third
person, singular number, and neuter gender; according to Rule 13th, which
says, "When a pronoun has two or more antecedents connected by _or_ or
_nor_, it must agree with them singly, and not as if taken together:" and
is in the objective case, being governed by _in_; according to Rule 7th,
which says, "A noun or a pronoun made the object of a preposition, is
governed by it in the objective case." Because the meaning is--_in
which_;--i. e., _in which sin or folly_.

_The_ is the definite article: and relates to _multitude_; according to
Rule 1st, which says, "Articles relate to the nouns which they limit."
Because the meaning is--_the multitude_.

_Multitude_ is a common noun, collective, of the third person, conveying
the idea of plurality, masculine gender, and nominative case: and is the
subject of _indulge_; according to Rule 2d, which says, "A noun or a
pronoun which is the subject of a finite verb, must be in the nominative
case." Because the meaning is--_multitude indulge_.

_Thoughtlessly_ is an adverb of manner: and relates to _indulge_; according
to Rule 21st, which says, "Adverbs relate to verbs, participles,
adjectives, or other adverbs." Because the meaning is--_thoughtlessly
indulge_.

_Indulge_ is a regular active-transitive verb, from _indulge, indulged,
indulging, indulged_; found in the indicative mood, present tense, third
person, and plural number: and agrees with its nominative multitude;
according to Rule 15th, which says, "When the nominative is a collective
noun conveying the idea of plurality, the verb must agree with it in the
plural number." Because the meaning is--_multitude indulge_.

_Themselves_ is a compound personal pronoun, representing _multitude_, in
the third person, plural number, and masculine gender; according to Rule
11th, which says, "When the antecedent is a collective noun conveying the
idea of plurality, the pronoun must agree with it in the plural number:"
and is in the objective case, being governed by _indulge_; according to
Rule 5th, which says, "A noun or a pronoun made the object of an
active-transitive verb or participle, is governed by it in the objective
case." Because the meaning is--_indulge themselves_;--i. e., the
individuals of the multitude indulge themselves.

_But_ is a disjunctive conjunction: and connects what precedes and what
follows; according to Rule 22d, which