In thisvolumewe willtreat thetopicofrationality,understanding theterm in abroad sense.Wewilltry to developaconstructive perspectiveonthe topic inwhichelements of philosophy of language,phenomenology,pragmatism,andphi-losophyoflifeare linkedwitheach other.Subjectsthat will be treated in the papersare: therelation of knowledgeand belief, of implicit and explicitknowledge, therole ofworld-pictures andforms of life,questionsregardingcertainty,error,doubt,and madness,about therole oflife practice,abouttheoretical andpracticalrationality, as well as aboutmattersofpluralismand relativism.