There are two great forces, God’s force of good and the devil’s force of evil, and I believe Satan is alive and he is working, and he is working harder than ever, and we have many mysteries that we don’t understand.

In this statement Graham frames human history and personal experience as a spiritual battleground between benevolent and malevolent powers. The “two great forces” language reflects a classic evangelical worldview in which moral evil is not merely psychological or social but also personal and active—identified with Satan. By adding that “we have many mysteries that we don’t understand,” he pairs certainty about the reality of evil with humility about the limits of human explanation, implying that suffering and wrongdoing cannot always be neatly accounted for. The overall effect is to urge vigilance and reliance on God’s “force of good” rather than complacency or purely secular diagnoses of evil.