Semantics, or the study of meaning, remained undeveloped, while phonetics made rapid progress and even came to occupy the central place in the scientific study of language.
Roman JakobsonLanguages differ essentially in what they must convey and not in what they may convey.
Roman JakobsonThe poetic function is the set towards the message itself, focus on the message for its own sake which by promoting the palpability of signs, deepens the fundamental dichotomy of signs and objects.
Roman Jakobson