Thanks for the reminder!
By pulling a single phrase out from the entire lesson of the Lord you can corrupt the meaning of that phrase.
Good thing I didn't do that.
Please see John 6:60-65 for Jesus' explanation of that very statement you use.
The explanation is not John 6:60-65. The explanation is John 6, plus the rest of the Bible.
Would that be sola scriptura that you are claiming? ;)