G3050–λογικός–logikos

I beseech you therefore, brethren, by the compassions of God, to present your bodies a living sacrifice, holy, acceptable to God, [ergänzt: which is] your intelligent service.

λογικὴν logikēn “reasonable”

as newborn babes desire earnestly the pure mental milk of the word, that by it ye may grow up to salvation,

λογικὸν logikon “reasonable”