At present, we are working with the light of truth presented by Dr. Francis Schaeffer from his book True Spirituality where we are discussing the basic considerations of the Christian life, or true Christianity.
When we say ‘moment by moment,’ we are dealing in practice with a succession of single, historical moments. No one lives his whole life at one time. Life is not a once-for-all thing; it is a series of moments. So when we talk about living the Christian life moment by moment, we can only live it in practice one moment at a time, just as my justification took place in one moment. There is no other way to do it. Nobody can live except moment by moment, and only one moment at a time. History is like a knife-edge, razor sharp. God has made sequence to be real, and the present is the present to me, the future is the future, and the past is the past.
So we must believe God’s promises at this one moment in which we are. Consequently, in believing God’s promises, we apply them—the present meaning of the work of Christ for the Christian—for and in this one moment. If you only can see that, everything changes. As we believe God for this moment, the Holy Spirit is not quenched. And through his agency, the risen and glorified Christ, as the bridegroom of the bride, the Vine, brings forth his fruit through us at this moment. This is the practice of active passivity. And it is the only way anybody can live; there is no other way to live but moment by moment.
We accept Christ as Savior at one moment and our guilt is gone on the basis of the value of the finished work of Jesus Christ. But after we become Christians, the moments proceed, the clock continues to tick; and in every moment of time, our calling is to believe God, raise the empty hands of faith, and let fruit flow out through us.
Thoughts developed or used directly from the work of Schaeffer, Francis. True Spirituality . Tyndale House Publishers, Inc