From His Life and Letters:
HEADQUARTERS ARMY or THE POTOMAC, December 20, 1863.
You ask me about Grant. It is difficult for me to reply. I knew him as a young man in the Mexican war, at which time he was considered a clever young officer, but nothing extraordinary. He was compelled to resign some years before the present war, owing to his irregular habits. I think his great characteristic is indomitable energy and great tenacity of purpose. He certainly has been very successful, and that is nowadays the measure of reputation. The enemy, however, have never had in any of their Western armies either the generals or the troops they have had in Virginia, nor has the country been so favorable for them there as here. Grant has undoubtedly shown very superior abilities, and is I think justly if entitled to all the honors they propose to bestow upon him.
HEADQUARTERS ARMY OF THE POTOMAC, 9 p. M., June 5, 1864
Since our last battle on the 3d inst. we have been comparatively quiet. I feel a satisfaction in knowing that my record is clear, and that the results of this campaign are the clearest indications I could wish of my sound judgment, both at Williamsport and Mine Run. In every instance that we have attacked the enemy in an entrenched position we have failed, except in the case of Hancock's attack at Spotsylvania, which was a surprise discreditable to the enemy. So, likewise, whenever the enemy has attacked us in position, he has been repulsed. I think Grant has had his eyes opened, and is willing to admit now that Virginia and Lee's army is not Tennessee and Bragg's army. Whether the people will ever realize this fact remains to be seen.
HEADQUARTERS ARMY OF THE POTOMAC, November 24, 1864.
I am sorry to hear what you say of Grant, but it is in accordance with my theory and experience. Public expectation in his case, as in Sherman's, having been wrought up to a false and unreasonable pitch, expecting impossibilities and miracles, visits on them the failure to do what only public imagination renders practicable. Both these when at one time were down. Sherman was pronounced crazy, and grant was at one time deprived of command; and now, should success by any accident attend the efforts of either, their stars will be more in the ascendant than ever.
Grant is not a mighty genius, but he is a good soldier, of great force of character, honest and upright, of pure purposes, I think, without political aspirations, certainly not influenced by them. His prominent quality is unflinching tenacity of purpose, which blinds him to opposition and obstacles — certainly a great quality in a commander, when controlled by judgment, but a dangerous one otherwise. Grant is not without his faults and weaknesses. Among these is a want of sensibility, an almost too confident and sanguine disposition, and particularly a simple and guileless disposition, which is apt to put him, unknown to himself, under the influence of those who should not influence him, and desire to do so only for their own purposes. Take him all in all, he is, in my judgment, the best man the war has yet produced. When I say this, I refer more particularly to those I have come in contact with, and do not include Sherman, about whom I know nothing but what I see in the papers.