What is the theme in The Practice of the Presence of God by Brother Lawrence?

Conversion experiences would be another theme. Lawrence, early in this volume, shares his own conversion experience. He sees a dead tree and, upon reflecting that it will one day be made new, he feels impressed to convert his own life and dedicate his talents to God. His dedication develops into the devotion that he describes in the conversations and letters. However, Lawrence quickly points out that he does not immediately attain his current level of peace and relationship with God. On the contrary, he struggled for years with his own relationship and value to God.