Praying small g prayers to our big G God.

I keep praying small g prayers, my excuse being... we can't pray prayers that we think don't align with God's thinking. How do I know anyway?

But... prayers are just conversations right? If I can talk big with friends then how come I have so much reserves when talking to God?

I seem to only pray requests that I had confidence in it happening already.

You of little faith, why are you so afraid?