Blasphemy is being aware of what you're doing, and yet, still being disrespectful towards God.
However.............
Being overly respectful and worshiping from afar has it's own pitfalls.
I used to be in AA at one time (wanted to stay in the Navy), and was at a meeting once. They had asked me to speak, and, I started to tell my story.
Along the way, I told them that I thought God was a really fine Dude.
The shocked gasp was incredible. People talked about me for months afterwards, and referred to me as "the guy who calls God a Dude".
But.......think about this..........
In almost every religion, be it Tao, Judaism, Christianity or whatever.........God is referred to as the Creator. He's also referred to us as as the Father of Mankind.
Now........think back to your own fathers.........
Did you have more fun with your dad when you guys (and girls) were horsing around and joking with each other? Did you not also maintain some kind of respect for your parents because they brought you here?
Or.........was your father a shadowy figure that was only there to administer discipline? Did you fear them?
Or..........were they the absent type, you never knew who they were, and didn't really care to find out about?
Think about this. The first, represents how we should treat HaShem (God). Shoot.......God even likes to wrestle with humans. Ever hear of the story of Jacob? It also states in the Bible to "make a joyful noise unto the Lord", which means laugh, sing, and joke around with God. Just make sure you're respectful. And.........because you know who your Father is, you don't need to fear Him, as respect takes that fear away.
The second, represents how many people view God in religion. They tell you He's a far away figure that only pays attention to you when you screw up. They tell you God is vengeful, wrathful, and will stomp you into the dirt when (not if), you screw up.
The third group are the atheists. They never saw Father, and don't really care if He's there or not.
So..........in my humble opinion, blasphemy is treating God with anything other than respect. And.........remember.........no human can BE God, but we are all a part of Him. Says so in the Torah by the way.........He carved off a small piece of Himself, and placed it in the embryo that your parents created. Which means you are a part of God. Buddhist philosophy refers to this quite nicely by the way.
But.........disrespect can also include being solemn and downcast every time you're in His Presence, because, after all, we are supposed to make a JOYFUL noise. Not a sad one.