The saints are sinners still. Our best tears need to be wept over, the strongest faith is mixed with unbelief, our most flaming love is cold compared with what Jesus deserves, and our intensest zeal still lacks the full fervor which the bleeding wounds and pierced heart of the crucified might claim at our hands. Our best things need a sin offering, or they would condemn us.

Spurgeon at His Best (ed. Baker Publishing Group, 1988)