Complex sentence: The second stanza shows the extent of the speaker's devotion to his creator, this can be seen through the way he says that when he is away from God mentally or physically his heart remains restless, and his works seems like it will never end.
Split into simpler sentences: The second stanza shows the extent of the speaker's devotion to his creator. This can be seen through the way he says that when he is away from God, mentally or physically, his heart remains restless, and the tasks at hand seem like they will never end.