Second scholasticism, analytical metaphysics, and Christian apologetics are the three topics characteristic of the lifelong efforts of the eminent Czech philosopher Stanislav Sousedík, who celebrated his 90th birthday in 2021. To honour this anniversary, a conference named accordingly was organized in Prague. The papers presented at this event — further elaborated by their authors and supplemented with Sousedík’s remarkable “Brief Autobiography” — constitute the gist of this book: a collective homage to Professor Sousedík and an attempt to promote and develop his intellectual legacy.