You are becoming someone. Not in the vague, inspirational sense-but in the most literal, consequential sense possible. With every choice, every act of faithfulness or neglect, you are forming the person who will exist forever. The Interval presents a profound yet neglected truth: the brief span between conversion and death is an unrepeatable window of formation where the clay is still soft and the wheel is still turning. What we do in this life-empowered by the Spirit, patterned after Christ-deposits treasure in heaven. Who we become through those same grace-enabled acts shapes the soul we carry into eternity. These two realities, doing and becoming, are inseparable movements of a single life. Drawing from Scripture, the church fathers, medieval mystics, and modern theologians including C.S. Lewis, Dallas Willard, and N.T. Wright, Jarred Fenlason builds a compelling case that eternal life has already begun. Heaven is not a great equalizer where all differences dissolve into uniform bliss. Scripture speaks of differentiated reward-crowns given for specific faithfulness, cities governed in proportion to proven stewardship, glory varying as star differs from star. Yet this is not a call to anxious striving. Salvation remains by grace alone. What differs is what we do with that grace during the interval-the capacity we develop, the character we form, the treasure we transfer. Death will fire the kiln, and what emerges will be the person we carry into forever. The Interval is written for sincere believers who may be faithfully serving yet lack awareness of how their earthly formation translates directly into eternal capacity and vocation. It combines doctoral-level theological rigor with pastoral warmth, offering not pressure but profound hope: this life matters more than we imagined, and the grace to live it well is already ours.The window is open. The Potter's hands are at work. What kind of soul are you becoming?