God and Discipline
The message in Isaiah 28 is a warning. It speaks (vs 6,7) of a drunken nation, religious leaders and all, living in "vomit" and finding God's teaching for infants.
What a startling resemblance of what is happening today. We live in a culture where we have lost vision of what is good and right and "exchanged the truth for a lie" as Paul mentioned in Romans. The vomit (vs. 8) refers to the filth in which we live. We have essentially compromised so much of our values when it has come to some moral issues [which are starting to become politicized] and veered so far off from where God intended for us to be. He also expresses his disappointment for these "drunk priests," the people we expected to stand up for the word, but have caved into the pressure and have been wooed into subscribing to some of the worlds belief system.
Vs. 13 says the people find God's word as "baby-talk." This comes from the fact that people have compromised and accepted science as the ultimate belief system: we now believe by proof and not faith as faith is starting to seem like mere entertaining folklores [forgetting all what God has done in the past through this very faith]. Furthermore, We feel that biblical definition of morality isn't "fair" enough and so as logical beings, we would need to re-interpret/redefine those teachings so as to make everyone happy. But in doing so we violate what God has put in place. Such scientific reasoning have made scientific belief systems more appealing because we want something we can see and in essence people forget about faith in the real deal [God Almighty]. While science offers us an understanding for phenomena, it was never meant to act a substitute for faith but a compliment to appreciate what God has done. Faith has consistently trumped science through resulting miracles: lame walking, blind-healing, terminal disease healing etc. Such phenomena is what science believes to be, which utterly contrary to what it stands for, luck.
This passage just warns not to lose one's faith in the pursuit of science,