culture as a weapon

i was reading c. s. lewis and i loved what he had to say:

"the glory of God, and, as our only means to glorifying Him, the salvation of human souls, is the real business of life. what, then, is the value of culture? it is, of course, no new question; but as a living question it is new to me...

i found a famous saying attributed to gregory, that our use of secular culture was comparable to the action of the israelites in going down to the philistines to have their knives sharpened. this seems to me a most satisfactory argument as far as it goes, and very relevant to modern conditions. if we are to convert our heathen neighbours, we must understand their culture. we must "beat them at their own game." but of course, while this would justify christian culture (at least for some christians whose vocation lay in that direction) at the moment, it would come very far short of the claims made for culture in our modern tradition. on the gregorian view culture is a weapon; and a weapon is essentially a thing we lay aside as soon as we safely can."

what if my pursuits were more aligned with seeking out the glory of God? what would that look like?
what if i view culture as a weapon? how would i be changed?