God's Unified Design in Humanity's Diverse Forms

Spurgeon draws upon the naturalist Buffon's observations to illuminate Psalm 33:15—"He fashioneth their hearts alike." Though mankind displays remarkable variety across climates, customs, and constitutions, all descend from one original creation. Buffon noted that humanity's essential nature remains constant: "Every circumstance concurs in proving that mankind are not composed of species essentially different from each other; that, on the contrary, there was originally but one species." While external conditions—climate, sustenance, disease, and intermarriage—produce individual variations over generations, these remain variations upon a singular human form, not fundamental divisions.

This scientific observation powerfully validates Scripture's claim that Elohim fashioned all hearts alike. The psalmist declares the universal human condition: every person, regardless of appearance or origin, shares the same essential heart before the Almighty. No racial, social, or circumstantial difference severs humanity from this primal unity of creation. The Eternal One who "understandeth all the works" of mankind recognizes no hierarchy of souls. This truth demolishes every pretense of human superiority based on external markers. Whether shaped by northern frost or equatorial sun, the human heart remains God's handiwork—equally valued, equally accountable, equally capable of receiving His grace. Thus Spurgeon anchors Christian community not in superficial resemblance, but in the profound reality that Yahweh fashioned our hearts in singular fashion.