I am helping a charity and I need to invite my friends to join in. We're not asking for any money or valuables but just their time for some feedback on few questions.
I am struggling at the opening line of the invitation message—what I want to say is that "I need your help in this great work / noble work" but it just doesn't sound that impressive/catchy.
Jihad or movement both describe something too big to describe "answering a few questions."
Please note that it is for non-native English speakers.