This image brought comfort and renewed belief in Jesus, I can’t imagine the Devil would want that message to get out to too many people.
Satan will appear as an angle of light - many will be deceived. Do you not think many will be comforted in myriad ways by the Devil? I’m not saying that is the case here, only trying to point out the danger in assuming something to be from God based on feelings. Our basis for what is of the Lord is Scripture, not experience. Note that God does not promise us good feelings (apart from joy of being His child), but He does promise His children persecution and rewards not of this world.