How do we know that C.H. Spurgeon's prayers were powerful?

C.H. Spurgeon's effectiveness in prayer was closely tied to both his profound knowledge of the Scriptures and the authenticity of his devotion. His prayers were a natural expression of his relationship with God, reflecting his immersion in the Word. It was noted that real prayer cannot occur without being steeped in Scripture, and Spurgeon's familiarity with it enriched his intercession, making his prayers touching and theologically profound. This combination of heartfelt sincerity and scriptural knowledge contributed to the undeniable power of his prayers.