Off the top of my head, four definitions of unshakable faith:
1. Using the five senses, calling it like you see it, and still choosing to believe in your imaginary friend.
2. Taking what works from your religion of choice, discarding what doesn’t work, and adding what is distinctly your own.
3. Questioning authority, seeing your heroes disappoint you, and still holding true to what makes your beliefs useful.
4. Understanding that your mind is unfathomably large enough to contain multiple states of consciousness simultaneously.
Got any definitions of unshakable faith you’d like to offer?