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The aim of this thesis is to examine the extent to which the elusive postmodern zeitgeist influences ordinary people's faith in God, their relationship to the church, and the congregational demands of the Christian church. It also seeks to answer how far the teachings of Dietrich Bonhoeffer, the influential theologian who was martyred during World War II, can respond to these congregational needs. The topicality of the paper lies in its aim to provide a systematic theological framework for Reformed congregational pastors and members, with the aim of providing them with a theoretical basis for confronting postmodern problems. One such problem may be the scepticism and relativism that is characteristic of postmodernism and that is present in the life of the average church member today. A further challenge for the church may be the change in postmodern language and the isolation of individuals from one another.

This is a study of Isaiah 18-20, three chapters in the so-called Isaianic prophecies concerning the nations, Isaiah 13-23 (24-27). Beyond being located close to each other in this literary corpus, there is at least one common element that ties these three chapters together: Isaiah 18-20 deal with two neighbouring countries of the Nile, Kush and Egypt respectively. The two lands were politically closely related in the era of the prophet Isaiah, so that addressing them in proximity to each other should not be surprising in a book set in the period of Uzziah, Jotham, Ahaz, and Hezekiah (Isaiah 1:1). Through a detailed analysis of the three chapters I hope to contribute to a better understanding of the collection of prophecies on the nations in the book of Isaiah and, more remotely, of the wider phenomenon of prophecies concerning the nations, so prevalent in the Hebrew Bible.