Thanks for the explanation. When you say:
>  When you receive sats through the Lightning Network, they are added to the balance of the payment channel that you have open with the sender.

My point is, that if I withdraw sats from my SN wallet and send it to my Zeus wallet, which is connected to my node, I am not opening a channel with the SN wallet.

That was my confusion. 

Others have explained to me what in fact does happen in this case. See prior responses.
