Love / Torment / Tolerate???

From love comes torment,
From torment comes tolerate,
From tolerance comes love,
From love, it generate strength for us to tolerate torment,
From tolerance, it show us how much we care for our partner,
From torment, our heart can truly tell us how we really feel for our partner,
From what i see, there is no escaping from either three,
From when it started, nobody knows, except it has always been there.