Dev has lost that faith in his radhika,his choice his love,thats why he even lost his faith in his own believes and was blinded by bh...His weakness was lack of faith in his own powers as husband and rjp...but radh didnt lost her trust in god,in dev in herself,even in her last moment her thoughts were with dev and kanha...she is and will be a fighter!Kanha saw an example in her for his childrean,through her he is rebuilding the trust in god of the people...and her reward will be justice and her husband back,stronger...he went trough fire so he could defend his wife better in the future,to trust her more,to have faith...