Robert Herrick

Give me a kiss, and to that kiss a score; Then to that twenty, add a hundred more: A thousand to that hundred: so kiss on, To make that thousand up a million. Treble that million, and when that is done, Let's kiss afresh, as when we first begun.

If a man made himself an expert in any particular branch of human activity, there would result the strong tendency that a peculiar aptitude towards the same branch would be found among some of his descendants.