Emerson was staunchly opposed to slavery, but he did not appreciate being in the public limelight and was hesitant about lecturing on the subject. He did, however, give a number of lectures during the pre-Civil War years, beginning as early as November, 1837. A number of his friends and family members were more active abolitionists than he, at first, but from 1844 on, he took a more active role in opposing slavery. He gave a number of speeches and lectures, and notably welcomed John Brown to his home during Brown's visits to Concord. He voted for Abraham Lincoln in 1860, but Emerson was disappointed that Lincoln was more concerned about preserving the Union than eliminating slavery outright. Once the American Civil War broke out, Emerson made it clear that he believed in immediate emancipation of the slaves.  Around this time, in 1860, Emerson published The Conduct of Life, his seventh collection of essays. In this book, Emerson "grappled with some of the thorniest issues of the moment," and "his experience in the abolition ranks is a telling influence in his conclusions." In these essays Emerson strongly embraced the idea of war as a means of national rebirth: "Civil war, national bankruptcy, or revolution, [are] more rich in the central tones than languid years of prosperity."  Emerson visited Washington, D.C, at the end of January 1862. He gave a public lecture at the Smithsonian on January 31, 1862, and declared:, "The South calls slavery an institution... I call it destitution... Emancipation is the demand of civilization". The next day, February 1, his friend Charles Sumner took him to meet Lincoln at the White House. Lincoln was familiar with Emerson's work, having previously seen him lecture. Emerson's misgivings about Lincoln began to soften after this meeting. In 1865, he spoke at a memorial service held for Lincoln in Concord: "Old as history is, and manifold as are its tragedies, I doubt if any death has caused so much pain as this has caused, or will have caused, on its announcement." Emerson also met a number of high-ranking government officials, including Salmon P. Chase, the secretary of the treasury; Edward Bates, the attorney general; Edwin M. Stanton, the secretary of war; Gideon Welles, the secretary of the navy; and William Seward, the secretary of state.  On May 6, 1862, Emerson's protege Henry David Thoreau died of tuberculosis at the age of 44. Emerson delivered his eulogy. He often referred to Thoreau as his best friend, despite a falling-out that began in 1849 after Thoreau published A Week on the Concord and Merrimack Rivers. Another friend, Nathaniel Hawthorne, died two years after Thoreau, in 1864. Emerson served as a pallbearer when Hawthorne was buried in Concord, as Emerson wrote, "in a pomp of sunshine and verdure".  He was elected a Fellow of the American Academy of Arts and Sciences in 1864.

Answer this question "Did he ever lecture regardless of how he felt?" by extracting the answer from the text above.
He did, however, give a number of lectures during the pre-Civil War years, beginning as early as November, 1837.