Bertrand RussellMysticism and LogicAnd Other EssaysThe following essays have been written and published at various times, and my thanks are due to the previous publishers for the permission to reprint them.The essay on "Mysticism and Logic" appeared in the Hibbert Journal for July, 1914. "The Place of Science in a Liberal Education" appeared in two numbers of The New Statesman, May 24 and 31, 1913. "The Free Man's Worship" and "The Study of Mathematics" were included in a former collection (now out of print), Philosophical Essays, also published by Messrs. Longmans, Green & Co. Both were written in 1902; the first appeared originally in the Independent Review for 1903, the second in the New Quarterly, November, 1907. In theoretical Ethics, the position advocated in "The Free Man's Worship" is not quite identical with that which I hold now: I feel less convinced than I did then of the objectivity of good and evil. But the general attitude towards life which is suggested in that essay still seems to me, in the main, the one which must be adopted in times of stress and difficulty by those who have no dogmatic religious beliefs, if inward defeat is to be avoided.CONTENTSChapter I. Mysticism and LogicII. The Place of Science in a Liberal EducationIII. A Free Man's WorshipIV. The Study of MathematicsV. Mathematics and the MetaphysiciansVI. On Scientific Method in PhilosophyVII. The Ultimate Constituents of MatterVIII. The Relation of Sense-data to PhysicsIX. On the Notion of CauseX. Knowledge by Acquaintance and Knowledge by Description