What can I know? Clever animals in the universe : what is truth? ; Lucy in the sky : where do we come from? ; The cosmos of the mind : how does my brain function? ; A winter's eve in the Thirty Years' War : how do I know who I am? ; Mach's momentous experience : who is "I"? ; Mr. Spock in love : what are feelings? ; Ruling the roost : what is my subconscious? ; Now what was that? What is memory? ; The fly in the bottle : what is language? -- What should I do? Rousseau's error : do we need other people? ; The sword of the dragon slayer : why do we help others? ; The law within me : why should I be good? ; The Libet experiment : can I will what I will? ; The case of Gage : is there morality in the brain? ; I feel what you feel : does it pay to be good? ; The man on the bridge : is morality innate? ; Aunt Bertha shall live : are we entitled to kill? ; The birth of dignity : is abortion moral? ; End of life : should euthanasia be allowed? ; Beyond sausage and cheese : may we eat animals? ; Great apes in the cultural arena : how should we treat great apes? ; The wail of the whale : why should we protect nature? ; Tears of a clone : can people be copied? ; Ready-made children : where is reproductive medicine heading? ; "Bridge into the spirit world" : how far can neuroscience go? -- What can I hope for? The greatest conceivable being : does God exist? ; The archdeacon's watch : does nature have meaning? ; "A quite normal improbability" : what is love? ; Do be do be do : what is freedom? ; Robinson's used oil : do we need possessions? ; The Rawls game : what is just? ; Isles of the blessed : what is a happy life? ; The distant garden : can happiness be learned? ; The matrix machine : does life have meaning?