Man's Search for Meaning by Viktor E. Frankl
Memoir of a holocaust survivor / brilliant psychiatrist / passionate human.
This book was mailed to me by one of my most treasured philosophical friends and guides, a man in the thick of it all working overseas as an epidemiologist.
This passage says everything:
"A thought transfixed me: for the first time in my life I saw the truth as it is set into song by so many poets, proclaimed as the final wisdom by so many thinkers. The truth - that love is the ultimate and the highest goal to which man can aspire. Then I grasped the greatest secret that human poetry and human thought and belief have to impart: The salvation of man is through love and in love."