To not give in to the enemy—that is the main rule for those who are fighting a war. An army commander warns every soldier ahead of time about the threat of enemy subterfuge, so that they would not be deceived and taken captive. A soldier left alone, hungry, shivering and without warm clothing undergoes a strong temptation to give himself up to the enemy. The cunning adversary will take advantage of his situation with all possible means.
Knowing what was awaiting him, Demetrius gave all his goods to his faithful servant Lupus to distribute to the poor, and joyfully awaited his imminent suffering for Christ the Lord.An angel of God appeared to him in prison, saying: "Peace be to you, O sufferer of Christ; be brave and be strong!"
That the righteous inherit the Kingdom of God is witnessed by the Most Pure Mother of God through her appearance in glory and light, with her protecting veil, with which she protects from evil all who run to her with tears, prayer and faith. She appeared and she still appears—not just for the sake of appearing, but in order to open the spiritual eyes of those without faith, so that they would learn of eternal life in the Kingdom of Heaven.
When seed is sown, the power of warmth and light must descend upon it to make it grow. When a tree is planted, the power of the wind must come in order to make it strong. When a householder builds his house, he has recourse to the power of prayer, in order to sanctify it. Our Lord Jesus Christ has sown a most select seed in the field of this world. The power of the Holy Spirit had to descend in order to warm and sanctify that seed, so that it would grow and prosper.
Thus did the One ascend to Heaven Who held heaven within Himself. He who carries hell within himself will end up in hell, but he who bears heaven within his soul will ascend to heaven. And truly, no one can ascend to heaven other than those who have heaven within; and no one can end up in hell besides those who have hell within.