Can Satan Read Our Thoughts?

Dear Jennifer,

I am currently leading your Me, Myself, and Lies study. The ladies and I are enjoying your study.  I have a question about Week 4, Day 2.  Is the statement “Every thought we think is not necessarily our own,” saying that Satan is able to read our thoughts or put thoughts into our minds?  If so, how is this accomplished?  Also, what scripture would back this up?  We had been talking about this subject some weeks ago and I know they will ask about this.

Thanks, Barb