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.

Read Hebrews 5:11 Using Other Translations

Of whom we have many things to say, and hard to be uttered, seeing ye are dull of hearing.
About this we have much to say, and it is hard to explain, since you have become dull of hearing.
There is much more we would like to say about this, but it is difficult to explain, especially since you are spiritually dull and don’t seem to listen.