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“Common sense is not a single unique conception, identical in time and space. It is the "folklore" of philosophy, and, like folklore, it takes countless different forms. Its most fundamental character is that it is a conception which, even in the brain of one individual, is fragmentary, incoherent and inconsequential.”
― Antonio Gramsci, Selections from the Prison Notebooks

“At first, therefore, logic must indeed be learnt as something which one understands and sees into quite well but in which, at the beginning, one feels the lack of scope and depth and a wider significance. It is only after profounder acquaintance with the other sciences that logic ceases to be for subjective spirit a merely abstract universal and reveals itself as the universal which embraces within itself the wealth of the particular-just as the same proverb, in the mouth of a youth who understands it quite well, does not possess the wide range of meaning which it has in the mind of a man with the experience of a lifetime behind him, for whom the meaning is expressed in all its power. Thus the value of logic is only appreciated when it is preceded by experience of the sciences; it then displays itself to mind as the universal truth, not as a particular knowledge alongside other matters and realities, but as the essential being of all these latter.”
― Georg Wilhelm Friedrich Hegel, Science of Logic

“Philosophy is, in the last instance, class struggle in the field of theory.”
― Louis Althusser, Essays in Self-Criticism

“Love without risk is an impossibility, like war without death.”
― Alain Badiou, In Praise of Love