Exhortation to Spiritual Renewal. 11^* About this we have much to say, and it is difficult to explain, for you have become sluggish in hearing. 12Although you should be teachers by this time, you need to have someone teach you again the basic elements of the utterances of God. You need milk, [and] not solid food.ⁱ 13Everyone who lives on milk lacks experience of the word of righteousness, for he is a child. 14But solid food is for the mature, for those whose faculties are trained by practice to discern good and evil.