Romanticism and dialectics are the fourth “constant” following conflict and strife. In 1956 Constant wrote about his vision of creativity: ‘The experiment can only exist as an antithesis to the prevailing aesthetics, the experiment is therefore dialectical by virtue of its essence…’  Following this line of reasoning he made a note circa 1980: ‘That which is no longer allowed’ in the visual arts: human sentiment, a ‘literary’ theme, an ‘aesthetic’ surface, a personal handwriting, spatial use of color, symbolism, memory of traditions, reference to something existing, criticism of morality. In short, art is no longer allowed. That is why I try to give my paintings all the above-mentioned characteristics.” 
From 1974, when Constant officially concluded his New Babylon project with an exhibition at the Gemeentemuseum in The Hague, he devoted himself completely to Romanticism. In lyrical colors he expressed what touched him: the struggle of the oppressed, Roma culture, music, literature, poetry, philosophy, animals, eroticism; but also betrayal, injustice and war. Within his oeuvre, this period touches closest upon Constant as a person.