I don't find the "appeal to the inner-witness of the Holy Spirit" very persuasive for reasons like these.
David Livingstone Smith: Less Than Human: Why We Demean, Enslave and Exterminate Others
Bernard Reginster: The Affirmation of Life: Nietzsche on Overcoming Nihilism
Excellent study of Nietzsche's philosophy and how it addresses the problem of nihilism in modernity. Well worth a read for both scholars and non-specialists interested in Nietzsche's ideas. (*****)
Quentin Meillassoux: After Finitude: An Essay on the Necessity of Contingency
Anya Kamenetz: DIY U: Edupunks, Edupreneurs, and the Coming Transformation of Higher Education
Gary Gutting: What Philosophers Know: Case Studies in Recent Analytic Philosophy
What troubles nearly everyone about philosophy is that it seems like they never reach any substantive conclusions and thus has not progressed as a discipline of knowledge. Gutting's book challenges this impression by examining both the methods of argumentation and the role of conviction and intuition in contemporary philosophy. (*****)
Michel Foucault: The Government of Self and Others: Lectures at the College de France, 1982-1983 (Michel Foucault: Lectures at the College De France)
These lectures focus on truth telling and it's connection to the government of the self and others in Antiquity. But, they are a part of Foucault's genealogy of the critical attitude, a project that was left unfinished at the time of his death. (*****)