It seems over the past couple of years, more and more atheist are coming out gun blazing against the Christian faith (and all other religion) to attack and destroy anyone who would so dear to mention the name of Christ. People like Richard Dawkins and Christopher Hitchens are using their intellectual abilities to try to destroy hope a religious people may hold in a creator. As Lewis elegantly stated, it is the jobs of those who have be called to a life of intellectual pursuit. When looking at the Christian body, we are made up of many parts each with his functions. While I believe every believer should be intellectually engaged in their culture, it would be difficult for some to pursuit such life because of the work they are already doing for the glory of Christ. As Lewis saw it, this is when those who are intellectual fill in the gap and give strength to those who may not possess the answers. By so doing, every member within the body of Christ will be doing its part to strengthen other members within the body.
If the Lord gives a person a desire for an intellectual life, then such a person should pursuit that life to the Glory of God. In turn, they should bless their brothers and sisters in christ (in any way possible) by imparting to them what ever wisdom or knowledge they is needed. If, as iron sharpen iron so one man another, then we as brother and sisters can and should sharpen one another any chance we get.
It is not awkward, nowadays, to see people going on and on about how spiritual they are. In fact it seems anyone who gets high and walks around would tell you how spiritual of an experience they had as they watch the trees change colors. But, as Lewis warns "Let us clear it forever from our minds. The work of a beethoven, and the work of a charwoman, becomes spiritual on precisely the same condition, that of being offered to God, of being done humbly as to the Lord." By this, a person could not just claim that any act they do is "spiritual" because such acts which are not done for the glory of God could not be so called. This is not to say that good music isn't good anymore or loving someone isn't an admirable act, but if the logic goes, that a truly spiritual act must be done to God in other to be spiritual, then we can not classify any act which is an imitation of true worship as "spiritual."