In order to extract and refine the sparks of holiness hidden in this material world during this era of exile, scholars study the laws of prohibition and permission, and the like. Through painstaking debate and deliberation, they isolate and salvage that which is permitted from that which is prohibited and that which is pure from that which is impure. Ultimately, their Torah study removes the Divinely imposed veil so that a clear adjudication of the law results.