For you therefore who believe is the honor, but for such as are disobedient, "The stone which the builders rejected, Has become the chief cornerstone,"

 (a) Logos ( G3056) is the great Stoic word for the reason which guides the universe; logikos ( G3050) is a favourite Stoic word which describes what has to do with this divine reason which is the governor of all things. If this is the word's connection, clearly spiritual is the meaning. 