I couldn't care less what Plato said about faith. Neither should any Christian.

Your faith is worthless if your faith is in the wrong thing. A Christian's faith should be in God. We shouldn't assume that good things will always happen because we're Christians. We know that God will be with us no matter what happens. Even if the sick person doesn't get well. Even if we can't find a job right away. Even if our unbelieving spouse leaves us. Even if our unborn child dies and there's no possibility in having another. Even when life is hard, God is still good. The cross of Christ is proof enough that God is good.