A.W. Tozer emphasizes that true Christian faith is an inward experience rather than an outward expression, highlighting that the essence of Christianity lies within the spirit and heart of the believer. He argues that many misunderstand the nature of faith by focusing on external solutions to internal problems, which only perpetuates the rut of the inner person. Tozer asserts that Christ dwells within us, making the inward transformation essential for genuine faith. He calls for believers to recognize that the kingdom of God is within and to seek spiritual renewal from the inside out.