I believe your quote was made on the evening before the demise of Thomas "Stonewall" Jackson who began his attack about an hour before sundown and conducted a foolish, hubris driven attack in the "mother of all jungles" in the dark. You forgot to add Hooker, before Chancellorsville, "May God have mercy on General Lee, for I will have none."
Got himself shot by his own men after Hooker's artillery spooked them. The great Stonewall caused the grievous suffering of his own troops by his self inflicted fratricide.
Just what does it do to the troops when there has been a death by fratricide. The 18th North Carolina went into a tailspin after Chancellorsville. I am working on the full consequence of the so-called "brilliant" flank attack of Jackson's. His hubris and lack of caution resulted in the death of some of his good staff. There are monuments to Jackson, in the battlefield and even his arm, but few for his staff that were killed with him on May 2, 1863. Jackson never asked about the battle or his men after his wounding. I particularly enjoy the comments made by Confederate based films about Jackson. In their zeal to praise and deify him they fall over each other with contradictions. I would probably not have investigated this if they just left well enough alone and only lionized Lee and Jackson. But the Lost Cause school of thought had to go on and demonize Grant and Sherman. From my experience in business, those kinds of lies perpetuate even more lies.