"I" is for Invite. Our goal is to stop an unhealthy thought in its tracks. After we've Stopped (S) it, found the Truth (T), and Replaced (R) the bad thought, go ahead and literally Invite the truth into your mind. Welcome it with open, loving arms. Show Truth the home you've reserved for it; right where the old unhealthy thought was.
It's a game I know, but our mind and ego want control- even demand control - so we must do all we can to take charge. I find it is also beneficial in creating the "new you" in your mind. You won't be the same person when you start to replace old worn-out thinking with what is really right and true. Welcome to your new world. You'll love it!