Why does Pip feel he cannot receive any more money from Magwitch? Is this an admirable trait of Pip’s?

Magwitch is a criminal. Pip, being a gentleman, feels he can't except money from such a scoundrel. No this isn't admirable. Pip will find out that the whole gentleman thing is largely an illusion. Magwitch actually has a kind heart and so - called gentleman can be the criminals. Pip has much yet to learn about life.