Thoughtless and selfish words and actions may indeed be something that you think you’re getting away with. Of course that’s doubtful. You never get away with anything do you, in this life?
What we are saying is that effective praying has to involve the whole being. It has to involve all of you. And it is a battle, and you have to work at it.
Be specific when you pray for yourself and for others. Then trust the blessed, faithful, promise-keeping God to answer perfectly and according to His eternal Will.