Definitions

I don't like it when people lose their temper or get extremely agitated and then say something rude or hurtful, even if said statement is true, that they know others are thinking and then say something like, "Well, at least I had the guts to say it!"  or "Well, you didn't have the courage to say anything."

Courage, in this particular circumstance, would be saying something that needed to be said even though it may be uncomfortable or painful for the hearer, because after thoughtful consideration you have concluded that not saying it will cause more damage.  Its saying such a thing honestly and directly, for the hearer's benefit (because you know they need to have it pointed out to them), without malice, self-righteousness or condemnation.  Its saying it because you feel that its the best path to better understanding and righteousness in the long run, and you have decided that you are willing and able to accept the consequences (whatever they may be) immediately.

Shouting something angrily (that may in fact need to be said) because you're so ticked off or frustrated that you just can't hold it any more isn't courage.  That's not you humbly acknowledging that there may be some negative consequences that you're willing to accept in pursuit of the greater good.  That's you losing your temper or patience and saying "to hell with the consequences" because you've lost your ability for self-restraint.

Courage doesn't always roar.  More often than we realize it is a bold but nevertheless soft and gentle voice.