When is a conjunctive adverb of time:  and relates to the two verbs, are and exert; according to Rule 21st, which says, “Adverbs relate to verbs, participles, adjectives, or other adverbs.”  Because the meaning is—­what conflicts are thy portion, when inclination and habit exert, &c.

Inclination is a common noun, of the third person, singular number, neuter gender, and nominative case:  and is one of the subjects of exert; 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—­inclination and habit exert.

And is a copulative conjunction:  and connects inclination and habit; according to Rule 22d, which says, “Conjunctions connect words, sentences, or parts of sentences.”  Because the meaning is—­inclination and habit.

Habit is a common noun, of the third person, singular number, neuter gender, and nominative case:  and is one of the subjects of exert; 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—­inclination and habit exert.

A is the indefinite article:  and relates to rebel; according to Rule 1st, which says, “Articles relate to the nouns which they limit.”  Because the meaning is—­a rebel.

Rebel is a common noun, of the third person, singular number, masculine gender, and nominative case:  and is put in apposition with inclination; according to Rule 3d, which says, “A noun or a personal pronoun used to explain a preceding noun or pronoun, is put, by apposition, in the same case.”  Because the meaning is—­inclination, a rebel.

And is a copulative conjunction:  and connects rebel and traitor; according to Rule 22d, which says, “Conjunctions connect words, sentences, or parts of sentences.”  Because the meaning is—­a rebel and a traitor.

A is the indefinite article:  and relates to traitor; according to Rule 1st, which says, “Articles relate to the nouns which they limit.”  Because the meaning is—­a traitor.

Traitor is a common noun, of the third person, singular number, masculine gender, and nominative case:  and is put in apposition with habit; according to Rule 3d, which says, “A noun or a personal pronoun used to explain a preceding noun or pronoun, is put, by apposition, in the same case.”  Because the meaning is—­habit, a traitor.

Exert is a regular active-transitive verb, from exert, exerted, exerting, exerted; found in the indicative mood, present tense, third person, and plural number:  and agrees with its two nominatives inclination and habit; according to Rule 16th, which says, “When a verb has two or more nominatives connected by and, it must agree with them jointly in the plural, because they are taken together.”  Because the meaning is—­inclination and habit exert.