"Childlike faith" refers to the innocent and unwavering belief that a child may possess. It suggests having trust, curiosity, and openness to the world, just like how a child believes in something without questioning or doubting it. Full definition
She may have an idea of some of it, and have plenty of misconceptions as well, but, her simple childlike faith in me as the one who cares for her terrestrial well - being does not necessitate that she understand or even know all that I am, do, and have done in order to provide for her that well - being. (redeeminggod.com)
Even people like me, who tend toward childlike faith to begin with, finally give up at some point and stop blaming themselves for the lack of relationship. (nakedpastor.com)