Men who have been permitted a second wife for post-war exigencies (4:3) must understand that: You will not be able to deal equally between your wives however much you wish. But turn not altogether away from one, leaving her as if in suspense between having and not having a husband. Fulfill the rights of each one of them and be mindful of Allah. Verily, Allah is ever Forgiving, Merciful. (Your effort is seen 53:40, and He is the Absolver of your imperfections).