Fyodor Dostoyevsky said this quote
“ Children can be told anything—anything. I've always been struck by seeing how little grown-up people understand children, how little parents even understand their own children. Nothing should be concealed from children on the pretext that they are little and that it is too early for them to understand. What a miserable and unfortunate idea! And how readily the children detect that their fathers consider them too little to understand anything, though they understand everything. Grown-up people do not know that a child can give exceedingly good advice even in the most difficult case. ”