The Buddha's had observed that life is suffering. Before He could find a solution to the problem of suffering in life, He had first to look for the cause of suffering. The Buddha was just like a good doctor who first observes a patient's symptoms and identifies the cause of illness before prescribing a cure. The Buddha discovered that the direct causes of suffering are desire or craving, and ignorance. This is the truth of the cause of suffering, which is the Second Noble Truth.