What makes one happy?

Happiness. So as I read Plato I find that he says that happiness consist in somewhat of a fashion to knowledge. In one sense I agree. But I don't agree in the general sense. I believe happiness is grounded in knowing and believing the gospel of Christ alone. This is diametrically opposed to the ideals of the world which thinks happiness consist of money, earthly belonging. Now I am not saying we don't want or need money or food or clothing. We are glad with them. But we do not base our happiness on those things.