The manger a feeding trough basically , so if one was to look at that in a spiritual way then certainly is a good message to that..
Jesus was not laid in a manger by accident. It is a major spiritual symbol. Animals go to the manger for physical food, but with Jesus lying on the hay, we can go to the manger for spiritual food. Jesus has an infinite storehouse of nourishment available, and we can approach him any time and never go hungry. Jesus feeds us with Word and Sacrament, his gospel and the Eucharist. Jesus wants us to devour his word (Jer 15:16; Ez 3:1; Rev 10:9-10), chew on it, slowly ruminate on its meaning, swallow and digest it, and make it part of the fabric of our being. Jesus’ Word is like no other food, it has the power to save our souls (Jas 1:21). Not only that, the infant in the feeding trough is the Bread of Life (Jn 6:35), the true bread come down from heaven, and whoever eats this bread will live forever (Jn 6:51). If a person wants to be spiritually well-fed, it is important to read Scripture and receive the Eucharist often.