Hebrews 5 contains some strange ideas. It begins by noting that high priests are fallible and have to offer sacrifices for their own sins. Then it goes on to say that Jesus "learned obedience" by suffering, and was "made perfect." Only then did he become the source of eternal salvation.
And then the author gets all condescending on us, saying that we need baby food! (Of course, he's talking to a particular audience, but STILL...)