You may admit that God is necessary, but do you honestly know that God is enough and that He is, in fact, more than enough? To find out if God is enough for you, let me ask you a couple of questions. Where do you obtain your joy? Is it from the Lord or from somewhere else? If your joy is from your health and it goes, then your joy will fly out the window. Many a believer has lost his health, his business, his family, his reputation, but has still maintained his joy because the source of genuine contentment and peace is in God. Indeed, one may not know that God is enough until God is all one has.
When was the last time you visited a hospital waiting room and shared Christ with those who are hurting? Maybe you could do that sometime this weekend.