Leon Trotsky on Baruch Spinoza

“Let him who wishes weep bitter tears because history moves ahead so perplexingly: two steps forward, one step back. But tears are of no avail. It is necessary according to Spinoza's advice, not to laugh, not to weep, but to understand!”

“Certain critics from the democratic camp, inclined to operate with the help of indirect evidence, have looked upon the “ironic” attitude of the author to the compromise leaders as the expression of an undue subjectivism vitiating the scientific character of his exposition. We venture to regard this criterion as unconvincing. Spinoza's principle, “not to weep or laugh, but to understand” gives warning against inappropriate laughter and untimely tears. It does not deprive a man, even though he be a historian, of the right to his share of tears and laughter when justified by a correct understanding of the material itself.”