Sharing and helping are important issues in ethical research. This study proposes a model based on flow theory by postulating key antecedents as the critical drivers of knowledge sharing and interemployee helping. Flow is the holistic sensation that employees feel when they act with total immersion and engagement, facilitating individuals' reciprocal activities such as knowledge sharing and interemployee helping. In the proposed model, knowledge sharing is influenced by flow experience directly and also indirectly via the mediation of interemployee helping. Accordingly, (...) the flow experience is influenced simultaneously by four exogenous factors related to individuals' perception about their work: work skills, self-fulfillment in challenges, perceived control, and vividness. This study contributes to the knowledge management literature by extending flow theory to the area of knowledge sharing and interemployee helping, by validating idiosyncratic antecedent drivers of the flow theory, and by performing a practical operationalization of the flow experience. This research also provides managerial implications for business leaders to boost their employees' ethical behavior in terms of sharing and helping. (shrink)