Being friendly to each other, they’re supporting each other, strengthening each other. In plain English, it simply means that both cards have remained relevant to our reading, their divinatory meanings have been reinforced by the other. There is also another attribute applied to this pairing of elements – they are both active. Again, simply put, it means the message of the cards is actually happening now, or is going to very quickly
If I free associate, I see strength in its formation; being armed at the ready; all the battalions are ready to move; feeling proud; standing tall; being illuminated; there’s a softness to this strength; it’s non-aggressive; shining a light in the dark; the light at the end of the tunnel.