Not being greedy and will to wait for delayed gratification rewarded you very nicely.

A year later,  she was being sexually harassed at her job so she quit.  

If they can't provide proper proof of income, or if they have more family members than your municipality allows in your apartment, or if they are felons, sexual predators, or other classes that your locale allows you to restrict applications based on, then good.  

Although I'm sure telling them "I told you so" offers a bit of gratification even if we should rise above that kind of thing.

I advise anyone looking to be successful to DELAY THAT GRATIFICATION!

Prohibited in all states is the refusal to rent because of ethnic background, race, religion, sex, sexual proclivity, age, marital status, or income source. 

I have given many people second chances, employed ex-cons, provided the start-up money for the second business of a guy whose first flamed out spectacularly, made a point of making sure the guy down the street who got into a legal but very embarrassing sexual mess got invited to the neighborhood cookouts. 

Instant gratification plays big in our society.

The sheer joy and gratification I feel when I am able to help someone in anyway.

We have to be careful about not including anything about race, ethnicity, sex, sexual orientation, familial status.