The Sanscrit language, whatever be its antiquity, is of a wonderful structure; more perfect than the Greek, more copious than the Latin, and more exquisitely refined than either, yet bearing to both of them a stronger affinity, both in the roots of verbs and in the forms of grammar, than could possibly have been produced by accident; so strong indeed, that no philologer could examine them all three, without believing them to have sprung from some common source, which, perhaps no longer exists...- Sir William Jones, 2 February, 1786, at the Asiatick Society.
2004, Benjamin W. Fortson IV, “Introduction”, in Indo-European Language and Culture, page 8