In chapter 4 of Galatians Paul is going to remind the Galatians that since they have been saved, they should not return to elementary principles of the world.  In this video we are going to answer four basic questions about the chapter.   1. What is the heir? (v. 1-7) 2. Is slavery to the world better than slavery to the law? (v.8-10) 3. How does legalism affect brotherly love? (v. 12-20) 4. How are Abrahams sons an illustration of legalism and liberty? (v. 21-31)   One of the dangers of coming out of legalism is the temptation to become progressive, or deconstruct our faith entirely. The reality of faith is that it strips away everything but Christ. So then, legalism is not the answer, but neither is "worldliness."  

https://www.thegospelcoalition.org/blogs/justin-taylor/why-abba-does-not-mean-daddy/ 

https://www.amazon.com/Galatians-You-Reading-Feeding-Leading/dp/1908762578