Absolutely. People receive enlightenment in a variety of ways. Some like @rok-sivante had his eyes opened by an ayuwasca experience.

It is our freedom to share and others freedom to accept or reject what we may tell them. But even a dream can open someone's eyes and change their life.

Hebrews 11:1 (BBE) Now faith is the substance of things hoped for, and the sign that the things not seen are true.

Everything can't be proven, but some things that cannot are commonly accepted. I believe we should question everything along with our experiences and come to our own conclusion.