I believe that when a person dies they can no longer do anything but to wait for the Judgement day, so in the case of the saints and the Blessed Virgin Mary they cannot pray for us because they no longer have those abilities. We can look at them as Christian role models, but to pray to them is something I disagree, for Jesus Christ said, “I am the way, the truth, and the light. No one comes to the Father except through Me” (John 14:6). It is not a suggestion but a command from Him, so why ask the saints and Blessed Virgin Mary when Our Lord Jesus Christ told us through the scriptures that He is the way to the Father? Jesus Christ also said, “If you ask anything in MY NAME, i will do it” (John 14:14). If you pray in the name of Jesus Christ, He will do it, so we do not really need the intercession of the saints and the Blesses Virgin Mary, for Jesus Christ is our intercessor and mediator to God the Father.
Pax
Laudater Jesus Christus
Instaurare omnia in Christo