Du Plessis' work shows a classical approach executed with a strong modern temperament. This is indicative of his admiration for masters of the past and a rigorous adaptation to modern standards. He skillfully portrays and reconciles the dualities of Life in his work. Techniques of juxtaposing Light and Dark, Conscious and Subconscious, etc. is used with subtlety and emotion. His work explores the connection between the visible and invisible; the subjective and objective.