Semi-mystical spirituality has become very popular today. Appealing to their reformed predecessors, some theologians today regard it as an important injection needed for the revitalization of their churches. Others, however, are taking a critical, more negative stance against mysticism. Thus the urgent question to be answered is: Should mysticism, as a part of contemporary spirituality, be accepted by Christians who want to be faithful to the Scriptures? In order to provide an answer, this investigation develops through the following five sections. It firstly takes a look backwards at the semi-mysticism of John Calvin (1509-1564). Secondly, it focuses on the trichotomist view of the human soul which strengthened the basis for semi-mysticism throughout history. The third section indicates that the semi-mystical thinking of Abraham Kuyper (1837-1920) was based on the same kind of view of the human being - an idea continuing till today. Therefore the next (fourth) part looks at some indications of the revival of a kind of piety characterised by inner, spiritual experience. The fifth section concentrates on a similar contemporary spirituality, emphasising the need of a close, personal and intimate relationship of Christian believers with God. Throughout the investigation the author's own comments and critique are included to be summarised in a concluding (sixth) part.