There is an illustration to describe this part of scripture.
When you put a rock into water, what you will get is that the rock is inside water, but water is not inside the rock.
But when you put cotton into water, you will get exactly what the scripture says. The cotton is inside the water, and the water is inside the cotton.
When our heart is hard, full of selfishness, we can’t let God dwell in us, but when we open our heart and let Him in, softly He will dwell in us.
And the next interesting point is that when the cotton is inside the water, the cotton is almost transparent, it changes to be like water’s color.
So it means when we dwell in Him, we are more like Him who dwells inside us. 🙂