Use that lens to develop a consistent message. Create your flag, then wave it. Reveal the touchstones that apply, then arrange them for easy use. Public speaking means risk. Audiences are more sophisticated and won't put up with you just phoning in.
Judgment is swift and sure.
Even if you are naturally eloquent, get help that will expand on what you do well. You will find many sources for help in enhancing your presentation skills, visuals, humor and content. Just say no . In your quest to give back, you will be tempted to accept every speaking invitation. Speeches can be a black hole in time and effort, so use them wisely.