Kepler’s discovery would not have been possible without the doctrine of conics. — Charles Sanders Peirce
A pair of statements may be taken conjunctively or disjunctively; for example, “ — Charles Sanders Peirce
Mere imagination would indeed be mere trifling; only no imagination is mere . — Charles Sanders Peirce
Theology, I am persuaded, derives its initial impulse from a religious wavering; — Charles Sanders Peirce
Mathematics is purely hypothetical: it produces nothing but conditional propositions. — Charles Sanders Peirce
Among the minor, yet striking characteristics of mathematics, may be mentioned the — Charles Sanders Peirce
A sign, or representamen, is something which stands to somebody for something — Charles Sanders Peirce
It is not knowing, but the love of learning, that characterizes the scientific man. — Charles Sanders Peirce
…mathematics is distinguished from all other sciences except only ethics, in standing — Charles Sanders Peirce