Single women have a dreadful propensity for being poor. Which is one very strong argument in favor of matrimony.

A celibate clergy is an especially good idea because it tends to suppress any hereditary propensity toward fanaticism.

Women are degraded by the propensity to enjoy the present moment and at last despise the freedom which they have not sufficient virtue to struggle to attain.

The propensity to truck barter and exchange one thing for another is common to all men and to be found in no other race of animals.

A propensity to hope and joy is real riches one to fear and sorrow real poverty.

Anyone who has lost track of time when using a computer knows the propensity to dream the urge to make dreams come true and the tendency to miss lunch.