Nicholas Rescher 
Humanistic Philosophizing [PDF ebook] 
Sensibility and Speculation in Philosophical Inquiry

Philosophy is the project of seeking for answers to "the big questions" regarding the condition of man, the nature of Reality, and man’s place within its scheme of things. The philosopher tries, as best one can, to address this range of complex and difficult issues. Against this background, this book considers some major areas of philosophical concern: namely, humans and their interpersonal relations, reality and our knowledge thereof, and philosophizing itself. It presents various case studies that typify the philosopher’s approach to the issues.