A book is a mirror: if an ape looks into it, an apostle is unlikely to look out.
书是一面镜子:如果一只猿猴往里看,不太可能有一位使徒往外看。
Mathematics is not a spectator sport. You have to get involved.
让女性成为理性的生物和自由的公民,她们很快就会成为好妻子和好母亲。