The particle γάρ introduces a causal explanation for the preceding imperative or prediction, yet the subject of the main clause (ὅτοισι τόνδʼ ὑπερβαλεῖ) is a relative pronoun with a dative plural form that functions as the indirect object of the verb ὑπερβαλεῖ ('will surpass them'). The construction relies on the colloquial Attic usage where ὅτοισι (dative plural of ὅς) serves as a relative pronoun referring back to an implicit or previously mentioned group (likely the 'knights' or the 'cavalry' of the title), while the verb ὑπερβαλεῖ is a future indicative active third person singular. The phrase ποικίλος γὰρ ἁνὴρ ('for the man is versatile/multicolored') uses the adverbial form ἁνὴρ (dialectal or poetic for ἄνθρωπος) with the article omitted, a common feature in Aristophanic dialogue to maintain metrical rhythm while emphasizing the character's unpredictability. The causal link between the man's 'variety' (ποικίλος) and his ability to 'surpass' the others suggests a specific rhetorical strategy where the character's moral or behavioral fluidity is presented as a tactical advantage rather than a defect.