Third born spirituality is devotional spirituality in which prayer is the way to appropriate the power of God. It is being filled with the spirit of God. Devotional spirituality is is full of metaphors about Jesus being the vine of which we are the branches, the door of the sheepfold, the bread of life and so on. According to John. Fourth born spirituality is mystical spirituality, in which a person makes direct contact with God.
Churches tend to lean toward a favorite kind of spirituality.
Lutheran Churches tend toward only child spirituality, Presbyterian and Reformed churches toward first born, Methodist toward second born, Charismatic churches toward third born and Roman Catholic toward fourth born. Of course, each of the church includes the other forms of spirituality also.