lower oneself

The handles are useful in other situations, too, including when lowering oneself into a car or hauling oneself out.

He blames tensions on the opposition: “When one doesn’t have a credible political programme, one can lower oneself to the subjective: race or ethnicity.”

Performing a Bond song means lowering oneself to the lovably tacky standards of the series.

It occurred several times, for it is no easy matter to lower oneself some six feet, from one edge to another, when heavily accoutred and carrying a rifle. 

Because one should hardly lower oneself to know a creature of that sort.