Reversing a linkedlist recursively in c

The following code works fine when head is sent as a parameter to it. As I am new to C, I couldn't understand how it works. Help me out please.

struct node *recursiveReverseLL(struct node *list)
{
    struct node *revHead;
    if (list == NULL || list->link == NULL)
    {
        return list;
    }

    revHead = recursiveReverseLL(list->link);
    list->link->link = list;
    list->link = NULL; 

    return revHead;
}

I dont know how the links are provided using those recursive calls. ie) if the links are as,

1 -> 2 -> 3 -> 4 

then hw is it changed as,

4 -> 3 -> 2 -> 1