I remember I had a student who told me that the change I was going to make in my life, moving to another country, was stupid. She told me that I was progressing, improving, and that what I was going to do didn't make sense. Of course, I did it anyway. Does she still believe those things, or was it envy? I don't know, but I do know that some of the stupid things I did led me to improve.
We are all stupid sometimes, and we will be again.