This document discusses the design of a positive psychology intervention using metaphor to motivate behavior change. It describes how design can help address societal challenges by making interventions more desirable and effective. The intervention discussed uses a metaphor of a journey to design an online program for teachers to lead a flourishing life. Several concepts were developed and tested with users through co-creation. Evaluation of a prototype found it was challenging and motivating though some elements needed more explanation. The next steps are to further develop the prototype and conduct a randomized controlled trial.