Ver. 13. “For every one that partaketh of milk is unskilled in the word of righteousness: for he is a babe.” What is “the Word [doctrine] of righteousness”? He seems to me here to hint at conduct also. That which Christ also said, “Except your righteousness shall exceed the righteousness of the Scribes and Pharisees” ( Matt. v. 20 ), this he says likewise, “unskilled in the word of righteousness,” that is, he that is unskilled in the philosophy that is above, is unable to embrace a perfect and exact life. Or else by “righteousness” he here means Christ, and the high doctrine concerning Him.