have the courage of (your/its) convictions

to do or say what you think is right no matter who disagrees with you.

He has the courage of his convictions to do what is right even when other disagree.

“What is needed is a political party with the courage of its convictions,” Chad said.

Related vocabulary: stand up and be counted

• be as blind as a bat
• be as bright as a button
• be as brown as a berry
• be as busy as a bee
• be as clean as a whistle
• be as clear as crystal
• be as clear as day
• be as clear as mud
• be as cold as ice
• be as cool as a cucumber
• be as crazy as they come
• be as [crazy/rich etc.] as they come
• be as cute as a button
• be as daft as a brush
• be as dead as a dodo
• be as dead as a doornail
• save your bacon
• save your breath
• save your own skin
• saving grace
• savoir-faire
• say a lot about
• say a lot about something
• say boo
• Say cheese!