Inquiring into the pedigree of an idea is not a bad means of roughly estimating its value. To have come of respectable ancestry, is primâ facie evidence of worth in a belief as in a person; while to be descended from a discreditable stock is, in the one case as in the other, an unfavorable index.
Essays, Scientific, Political, and Speculative (Volume 1), The Nebular Hypothesis (p. 108)