If you ever tried to walk on a fallen tree log, you understand what the expression means.

VOA: special.2009.06.07

"I doubt if you can understand how happy this modernizing has made me.

VOA: special.2009.12.07

You don't understand. If you did, you'd come with me.

VOA: special.2010.05.15

"If you don't understand something, don't sign it."

VOA: special.2010.04.30

"We saw,with the stimulus the effort to rush and spend, what can happen if you jam major legislation before people have an opportunity to understand what is in it,".

VOA: standard.2009.07.21