Though you cannot prove it, likely you have had evidence of the abiding spiritual presence of your loved one in some way that affirms the reality of the unseen. Perhaps something occurred that you know without question was an unmistakable sign or signal that you alone would understand. Its power and force affirmed to you the real, eternal presence of your loved one. For now, the reality of the unseen is a mystery. It is God’s mystery of life and death. God’s unseen reality is eternal life, which is the very promise of faith. “By faith we understand that the worlds were prepared by the word of God, so that what is seen was made from things that are not visible” (Hebrews 11:3 NRSV).