There are those verses in the Bible that have their own light, in the sense that you do not have to go through the whole Bible to understand them, because, certainly there are many verses that are difficult to understand and can not be interpreted by themselves, but there are that study the context to be faithful to what the author wanted to say.
There is a verse in the Bible that seems to be among the most cited of our century, which is John 3:16, also other texts, like Philippians 4:13, Psalm 23, Psalm 91, among others, seem to be the most mentioned in our times. But it is also very true that we often interpret them superfluously, and we do not give them the true meaning that the author gave them at that time. But with John 3:16 this does not happen, almost everyone understands what the verse means, although perhaps there are some other things that escape to us.
In John 3:16 all the love of God for humanity is summarized, because in His short words He gives us a great detail of the love that the Father felt for the world.