This is the latest promotional video from Issues Etc:
Hebrews 5:13-6:1, emphasis added:
Anyone who lives on milk, being still an infant, is not acquainted with the teaching about righteousness. But solid food is for the mature, who by constant use have trained themselves to distinguish good from evil.
Therefore let us leave the elementary teachings about Christ and go on to maturity …
When C.F.W. Walther was explaining why laymen should study both the Bible and the Christian Book of Concord, he said: