some good idioms for spanish speech

Question

I need idioms for a spanish speech about injustice and heroes.

Thanks!

It's always a good idea to do a search first. You may find more information that way and faster. This is something you should do, your own research. - rac1, Sep 28, 2016

SD has a book of idioms and Phrases. - ray76, Sep 28, 2016

Where is that, Ray? - rac1, Sep 29, 2016