Truth Undefined! Ultimate Truth Might NOT even Exist !!

I often hear one tries to figure out and explore the Truth of Universe !  But it seems to me that Truth itself could be undefined ! 

There may NOT be any Truth , it possibly appears to one in illusion way based on the causal day to day reasoning and one is searching for the Ultimate Truth that doesn't even possibly exist !! This assumption of existence of Truth based on day to day reasoning experience should need to be relooked at probably??