I've severally discussed this issue with my catholic friends n their answer is dat if u intercede for Mary, then Jesus ll intercede for u b4 God. Do u think dis is Biblical? If u ask me i think Mary is just another woman on the surface of the earth, she was just fortunate to be d mother of our Saviour, so praying through her, to her or for her is very wrong. I don't want to step on anyone's toe here, just air ur view. That's all.