Hebrews 5:13–14

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.

Now everyone who lives on milk is inexperienced with the message about righteousness, because he is an infant. But solid food is for the mature—for those whose senses have been trained to distinguish between good and evil.

For someone who lives on milk is still an infant and doesn’t know how to do what is right. Solid food is for those who are mature, who through training have the skill to recognize the difference between right and wrong.

For everyone who partakes of milk is unacquainted with the message of righteousness, because he is an infant. But solid food is for the mature, who because of practice have trained their faculties for the distinguishing of both good and evil.

For every one that useth milk is unskilful in the word of righteousness: for he is a babe. But strong meat belongeth to them that are of full age, even those who by reason of use have their senses exercised to discern both good and evil.