I didn’t think so much about that when I was growing up. In fact, I remember very clearly walking down the hall of my college dorm and saying to myself, “It doesn’t matter what I think because no one knows my thoughts but me!” I was probably thinking something I wouldn’t have wanted written on my forehead for anyone to see.
Some years later, I found out how important our inner thoughts are. I had a headache. I had never experienced a headache, until one morning I felt intense pain. My first thought was to find relief by getting into a tub of warm water—my usual comfort spot whenever I was troubled. But I sat there with tears running down my face because I found no relief.
Then, I began to consider what I had been learning through my study of Christian Science. I was a fairly new student at this time. I remembered that it was important not to allow evil to lodge itself into my life through the unguarded “door” of my thought. (See Science and Health, p. 392:24)