Your word is your bond. Integrity and fear of God were the key character traits that qualified these leaders to govern Jerusalem. Leaders with integrity can be trusted to carry out their work. You've got the right to say anything you like. It depends solely on your integrity.
Integrity is the prerequisite to acceptance.
If you expect to be paid attention to, back it up with your life. Let your walk correspond to your talk. This is fundamental to your witness for Christ. Many so-called Christians listen too little, talk too much, and live lives that contradict what they say. Their 'witness' betrays Christ and alienates those to whom they speak.