When considering anything the Bible teaches, we should consider the "whole counsel of Scripture".
Which means we should compile everything Scripture teaches on any given topic to determine what it teaches about that topic.
This keeps us on guard from cherry picking Scripture to mean whatever we want it to mean.
It's the foundation behind "Systematic Theology".
This is a tough task. It takes a lot of time and effort. That's why it's wise for us to take advantage of resources and teachers in the Church that have already done that work.
I've been reading one lately called Systematic Theology by Wayne Grudem and his companion ethics book using the same method of Christian Ethics.
I highly recommend both to get a foundation to understanding Christian Theology and learning to apply the whole counsel to how we should view and live our lives as Christians.
Have you guys read any other good Systematic Theology books or Christian Ethics book that use this same approach (compiling everything the Bible says on topics and drawing conclusions from the "whole counsel of Scripture")?