"The poet must always, in every instance, have the vibrant wo..." — Knut Hamsun quote meaning

The poet must always, in every instance, have the vibrant word... that by it's trenchancy can so wound my soul that it whimpers.... One must know and recognize not merely the direct but the secret power of the word; one must be able to give one's writing unexpected effects. It must have a hectic, anguished vehemence, so that it rushes past like a gust of air, and it must have a latent, roistering tenderness so that it creeps and steals one's mind; it must be able to ring out like a sea-shanty in a tremendous hour, in the time of the tempest, and it must be able to sigh like one who, in tearful mood, sobs in his inmost heart.