"Blasphemous" is similar to "heretical." It means going against God in a very offensive way. So, for example, to "blaspheme" is to denounce God, curse him, etc.
Both of my parents are in Heaven and sometimes it just feels better if I talk/pray to them .. not sure if when I do it and hear my problem...I work it out myself ..or they somehow help... not sure but it makes me feel better .. also I truly miss not having them here and it makes them feel like they are still in my life. What harm could this be??? I know that GOD is my FATHER and that 耶稣 is My savior, the KING of KINGS...the LORD of LORDS...
I think it depends on your denomination. Catholics pray to Mary and the Saints all of the time. It's part of their doctrine.
I am not so familiar with the "rules" about this except for the Commandments (no other gods before me, etc). However, I don't believe that this counts as worshiping "false gods," because 你 aren't acknowledging Mary 或者 the saints as gods, simply as holy people. I think people pray to 天使 like Michael 或者 Gabriel for similar reasons.
Either way, it definitely depends on your denomination. And like I said, I'm unfamiliar with the specific viewpoints of each denomination on this subject. But if the Catholics do it, and if anyone else does, based on their religious viewpoint, I think that's perfectly fine.
Since 耶稣 is our High Priest and Advocate with the Father, why would 你 pray to any one else. I'm not trying to put anyone's beliefs down 或者 be judgemental. Why wouldn't we want to go staight to God with our prayers.