Here are weighty thoughts, thoughts that press and urge, thoughts that carry and communicate the gravity of centuries. They contain an interpretation. They clarify and illuminate. And they all co-ordinate. They combine and operate together to enforce agreement. They demonstrate that tyranny breeds a baleful progeny of guilt and woe; that robbery binds the robber under debt to the full measure of his rapine; that such guilt can never be forgotten; that such a woe is pitiless; that the centuries, though slow and mute, are attentive and impartial witnesses; and that God's even judgments are over all, and are altogether just. This is all the content and all the purport of this paragraph, and of all this speech: an exposition of American slavery and of its resultant civil war, in moral terms, before the moral bar of every hearer's conscience, and beneath the thought of God's eternal righteousness; all turning upon the self-evident verity that unpaid toil is wrong. In this prolific affirmation is the fertile germ of all that Lincoln ever thought or undertook in that supreme decade. Here are enfolded all his axioms and postulates and propositions. By interlocking its multiform, infolded, self-evident certitudes he framed all his arguments. Its overflowing, resistless demonstrations in active human affairs formed all his corollaries. Toil unrequited is a moral wrong. It cries to heaven, and shall be avenged. In this avenging, if we but see our day, there is an open door to join with heaven, and transmute its vengeance into recompense and reconciliation. This was Lincoln's logic. It was purely ethical. This was the master-key to his transcendent statesmanship. Here was the secret of his political efficiency. Thus, and in no other way, he swayed the Nation. Himself a Godlike man, and discerning in every other man the same Godlikeness; trusting his own soul's honesty, and appealing to honest manhood in all other men; he took his stand beside all the oppressed, and against all extortion; and voiced and urged and trusted the sovereign moral plea for perfect charity, and perfect equity for all. But Lincoln's logic was interlaced with history. All through his debates and addresses are woven the facts and sequences of our national career. And to these connected events he clung in all his arguments, as a man clings to the honor of his home. There was in those events an argument. To tamper with that history, discrediting its sure occurrences, or distorting their right connection, was in his conception a downright immorality.