Take On Faith Meaning

(transitive, idiomatic) To accept something without seeing evidence supporting it, by trust or confidence.

Example: 2010, Mark R. Crovelli, Gathering Data while Washington Burns:
  Their own parents, for example, will be able to regale them with tales about how they simply took it on faith that democracy was the best possible form of government, and this blinded them from even considering the possibility that Washington was full of idiots and crooks.