The Christian Ethos is a collection of related articles from several different sources. Some of the chapters have been translated from Troost's earlier book, Geen aardse macht begeren wij (We Desire No Earthly Power). Other chapters are revisions of his lectures delivered at the Central Interfaculty of the Free University of Amsterdam and those delivered at the Reformed Theological College in Geelong, Australia. A lecture delivered at the University of the Orange Free State, Bloemfontein, South Africa in 1975 is also included. As a whole, The Christian Ethos is essentially a popular and preliminary approach to a systematic study of philosophical ethics.