If your audience is largely secular, these are the questions they may well raise:
Why do we have to bring religion into meditation?
Meditation purifies religion and restores it to its true purpose of teaching and inspires the spiritual unity of humanity.
Do I need faith to meditate?
In the first place we may not be aware of what brings us to meditate. We may feel we have little or no faith. Fidelity is needed to keep meditating.
What are the physical benefits?
Medical evidence shows for example that meditation lowers blood pressure and enhances the immune system. But the greatest significance of meditation is enhancing the sense of our human wholeness in the harmony of body, mind and spirit.