2 Corinthians 5:5-7

Now He who has made us and prepared us for this very purpose is God, who gave us the [Holy] Spirit as a pledge [a guarantee, a down payment on the fulfillment of His promise]. So then, being always filled with good courage and confident hope, and knowing that while we are at home in the body we are absent from the Lord— for we walk by faith, not by sight [living our lives in a manner consistent with our confident belief in God’s promises]