The spirit of God is like unlimited or infinitely high voltage power. If humans were exposed to his direct spirit/power, we would instantly die. His power must be stepped down for us to not die from his presence. Much of my teaching is based on the heart, in this illustration you can look at your heart as the transformer that steps down God's power. Jesus taught this in the parable of the sower. He basically says that you can experience as much of the kingdom as your transformer/heart will allow you to experience. I pray you increase the capacity of your transformer to allow more power to flow!