Those in spirit know of your prayers for them.

When you pray to God for the benefit of those you know who exist in a purely spiritual form of energy, those spirits know of your prayers because the movement on this sphere of spirit is felt, is recognized, is acknowledged by all on this sphere. When you suffer, the spirits of all that exist share in that suffering. When you seek balance in health in the world as you know it, that energy of seeking God’s presence is felt, is recognized by all that is spirit.

Certainly, when you pray on behalf of another, that other individual may not be aware consciously of your prayers, but those prayers on behalf of another are loving prayers, and it is that loving presence that provides strength, that provides the connection to all that exists.