Lincoln thought not alone of momentary issues, but also of eternal verities. Some things which his friends wished him not to say, for fear it would lose him votes, he said, because they were things that were true and ought to be said: for example, "This nation cannot endure half slave and half free.... A house divided against itself cannot stand.... I do not expect the house to fall.... I do not expect the Union to be dissolved. I do expect it to cease to be divided. It will become all one thing or all the other. Either the opponents of slavery will arrest the further spread of it and place it where in the public mind it is in the course of ultimate extinction; or its advocates will push it until it will become alike lawful in all the states, old as well as new, North as well as South." While such utterances probably did cost him votes at the time, later his people could see that his prophetic vision had been right and their confidence in him, always strong, was accordingly increased. Lincoln, with the training of the lawyer, the wily cross-examiner, the profound jurist, the farsighted statesman, forced Douglas into a dilemma between the northern Democrats of Illinois and the southern Democrats of the slave states. Lincoln was warned by his friends that Douglas would probably choose to please the Democrats of Illinois and be elected United States Senator; but Lincoln replied to his friends: "I am after larger game: the battle of 1860 is worth a hundred of this." Time proved that Lincoln was right. While Lincoln's friends guessed wisely as to the prediction that Douglas would choose to secure the Senatorship by pleasing the Democrats of Illinois, many of whom were opposed to slavery, Lincoln was wise in his prediction concerning the effect on the campaign of 1860 for President. For example, one of the questions Lincoln asked was: "Can the people of a United States Territory, in any lawful way, against the wishes of any citizen of the United States, exclude slavery from its limits prior to the formation of a state constitution?" If Douglas should answer, "No," he would alienate Illinois; and if he should answer "Yes," he would alienate the South. In a remarkably adroit manner Douglas answered, "Yes," and delighted his friends in Illinois; but later the effect in the South was clearly against him. In the United States Senate Douglas had proved a match for the best debaters in the land, but he remarked after his series of debates with Lincoln that in all his sixteen years in the Senate he had not met one whom he would not rather encounter than Lincoln. To the very end of the debate Lincoln kept the argument pitched on a very high plane of dignified logical search for clear truth; which was something unusual in political contests. He kept referring to such ideas as, "Is slavery right or wrong?" "It is the eternal struggle between right and wrong." Lincoln was pleading for humanity.