As a humorous motivational speaker one of the most requested topics I have evolves around how to get others to change. The challenge is people have to want to change, so you have to give them good reason.
Any cry for change must appeal to both logic and emotion for it to hold. Throughout our day people continually make decisions based on our emotional and rational ( logical)side. This continual schizophrenic thinking requires self control. It works like an inner monitor that forces us to pay attention to our behavior and alter it to suit the change initiative.
The reason change is hard for most people is that this level of self control is exhaustible and will run out. Change is hard because people wear themselves out. We get exhausted.
To craft a motivational speech to compel change, a truly analytical case is reasonable..but it will have direction without emotion. To really get others to change, you have to speak to logic and emotion. Just like understanding a problem does not fix it, knowledge does not change behaviour but emotion has the power to.
Next, what looks like audience resistance may be a lack of clarity. People need clear direction too.
In a motivational speech to compel change always use an active voice. If you want people to act with clarity don't say get healthy, say work out 3 times a week for 45 minutes at a time.
Turn skeptics into believers by providing a clear path to manage expectations. Most people need specific instruction and an appeal to emotion to motivate change.
Finally, celebrate successful efforts worth emulating, appreciate people for there contribution and tie your motivational speech to the change ahead.
Humorous Motivational Speaker on change, Motivational speech