Romans 8:28 (KJV)
And we know that all things work together for good to them that love God, to them who are the called according to his purpose.
This is a very popular verse as a standalone but should be understood in context. All of Chapter 8 talks about the ways of the flesh versus the ways of the Spirit. We are unable to do any of the things that we are charged to do without the unimaginably intricate plan that God has laid forth for us from the beginning. To say that everything is tied together is so far beyond our mortal understanding that I couldn’t imagine understanding it even when we are in Heaven, but if it is to be, then shall it.