Science is the assurance of things that exist, hoped for or not, the conviction of things that are actually seen.

Cute, but false. Scientists have been positing "things" for centuries that a consensus of modern scientists no longer believe exist. Also, most of the controversial parts of science don't have anything to do with what can been "seen", but things that are only observable using specialized equipment (which would seem equivocal to the non-scientist) or when interpreted from inside an elaborate theoretical framework (which the non-scientist would likely not even understand).