for cause
(law, ethics) For a legitimate, specific reason; with justification.
I have to go, but I can't explain the reasons of my choice to you. At this moment things are testifying against me. I fight for cause that can't be understood at this time, but one day people will see that I stood on the side of what is right. Matteo Messina Denaro
The God of Peace, the God of Truth will shortly seal this truth, and confirm this witness, and make it evident to the whole world, that the doctrine of persecution for cause of conscience, is most evidently and lamentably contrary to the doctrine of Christ Jesus the Prince of Peace. Amen. Roger Williams (theologian)