The 2nd line is designed to be open to the few ones who know how to call it out.
In other words, you’re meant to be inaccessible to everyone but the few ones you cannot hide from, as they know how to get you, such as in the case of a mother getting the call from her daughter, or a daughter getting the call from her sister, especially if there is a deep bond between them.
The point is that your beloved ones always know how to call out your willpower, regardless of whether the will is there in that very moment or not.
So, that’s what you might need to pay attention to, to avoid getting caught into unhealthy situations.
Because, if you have no will, it’s time to rest, no matter what you get the call for, or whom you get called by.