Mark 4:33
With many such parables Jesus used to speak to the people of his Message, as far as they were able to receive it;
John 16:12
I have still much to say to you, but you cannot bear it now.
Matthew 13:34-35
Of all this Jesus spoke to the crowd in parables; indeed to them he used never to speak at all except in parables,
1 Corinthians 3:1-2
But I, Brothers, could not speak to you as men with spiritual insight, but only as worldly-minded-mere infants in the Faith of Christ.
Hebrews 5:11-14
Now on this subject I have much to say, but it is difficult to explain it to you, because you have shown yourselves so slow to learn.