Henry Scougal 
The Life of God in the Soul of Man (Rediscovered Books) 
With linked Table of Contents

True religion is a union of the soul with God, a real participation of the divine nature, the very image of God drawn upon the soul, or, in the Apostle’s phrase, ‘It is Christ formed within us.’-Briefly, I know not how the nature of religion can be more fully expressed, than by calling it a Divine Life: and under these terms I shall discourse of it, showing first, how it is called a life; and then, how it is termed divine.