Levels in the Service of Hashem
Now, to explain this, we must first explain that there are two levels in the service of Hashem:
The First Level: Fiery Love
The first: A fiery love, characterized by a great energetic surge to leave the body and be like a flame that rises upwards and tried to separate from the wick.
This is called ‘Ahava Rabbah-Abundant Love,’ which the heart cannot contain, as the heart cannot withstand such intense emotion.
Because of this love, the soul cannot (i.e., does not want to) stay within the body, and desires instead to leave the sheath of physicality and the corporeality of the body.
The Second Level: Settled Emotional Excitement
The second: An emotional excitement that is settled within the heart.
The main focus of this love is to draw forth G-dliness from above to below, in ‘vessels of different varieties,’ referring to the ‘vessels’ of the words of the Torah and the actions of the mitzvos.
And this is the idea of ‘Ratzo V’Shov-Running and returning.’