Answer:
Hamlet expresses to Ophelia through his letter how a lot of liers are surrounding them
Step-by-step explanation:
As he put his infinite love for her in a passionate poem, he also camouflages the real situation that he is going through with the betrayal to his father and his sudden death on his uncle's hands, and as he says that she can doubt all universal truths like the ones in the stars and space he is referring to the lack of honesty that has been shown by the people in the castle.