Matthew 21:34-41
And when the season for harvesting the grapes approached, the owner of the farm sent his slaves to the tenant farmers to arrange for delivery of his crop.
Philippians 3:1
Finally, my brothers, rejoice in [your relationship to] the Lord. It does not trouble me to write the same things to you again, because you will be safer if I do. [Note: These "same things" may refer to warnings against false teachers which Paul had either spoken to them or written about previously].
2 Timothy 3:7
They are constantly learning and [yet] never able to arrive at a [full] knowledge of the truth.
Hebrews 5:12
For certainly enough time has elapsed so that [by now] you ought to be teachers, [but instead] you are in need of having someone teach you again the basic principles of God's message. You have become people who need "milk" and not "solid food." [Note: The fundamental truths of Christianity are here figuratively spoken of as "milk," while the more advanced teaching, such as Christ's priesthood being like Melchizedek's, is called "solid food"].