Understanding cannot be forced on someone who chooses to be ignorant.

To experiment in a haphazard or random manner with the hope that some amount of success may be encountered.

Alternative form of there are none so blind as those who will not see

Alternative form of raise the flag and see who salutes

present participle of send it up the flagpole and see who salutes

(humorous) Indicates the speaker has noticed an erection underneath the interlocutor's clothes.

Problems and losses that do not reach the attention cause no worries and no grief.

A structure composed of a plank, balanced in the middle, used as a game in which one person goes up as the other goes down. / A series of up-and-down movements.

(intransitive) To use a seesaw. / (intransitive, by extension) To fluctuate. / (transitive) To cause to move backward and forward in seesaw fashion.

fluctuating.