Hebrews 5:11-14 New International Version (NIV)

Warning Against Falling Away

¹¹ We have much to say about this, but it is hard to make it clear to you because you no longer try to understand. ¹² In fact, though by this time you ought to be teachers, you need someone to teach you the elementary truths of God’s word all over again. You need milk, not solid food! ¹³ Anyone who lives on milk, being still an infant, is not acquainted with the teaching about righteousness. ¹⁴ But solid food is for the mature, who by constant use have trained themselves to distinguish good from evil.

Hebrews 6:1-3 New International Version (NIV)

6 Therefore let us move beyond the elementary teachings about Christ and be taken forward to maturity, not laying again the foundation of repentance from acts that lead to death,^[a] and of faith in God, ² instruction about cleansing rites,^[b] the laying on of hands, the resurrection of the dead, and eternal judgment. ³ And God permitting, we will do so.