What is the relation between human life on earth and 'life' after death in the theology of Saint Thomas Aquinas (1224/5-1274)? In this study this question is dealt with from the perspective of the foundations, dynamism and perfection of the human relationship with God. It is shown how Aquinas' ('negative') theological analysis of 'life' as a name of God works out in qualifying his account of both human life on earth and 'life' after death as two interrelated modes of living with God. Written at an accessible level and having the width of a thematic study on the key-word 'life', this book can also be read as an introduction to the theology of Thomas Aquinas.