I have more Gregory of Nazianzus for you:

For it is necessary to be truly at leisure to know God; and when we can get a convenient season, to discern the straight road of the things divine. And who are the permitted persons? They to whom the subject is of real concern, and not they who make it like a matter of pleasant gossip, like any other thing, after the races, or the theater, or a concert, or a dinner, or still lower employments. To such men as these, idle jests and petty contradictions about these subjects are a part of their amusement (1st Theological Oration 3).

If you want my opinion on the matter, you really should put down any contemporary-American-evangelical book you are currently reading and pick up some Gregory.