I made a CD that plays the affirmations over and over again, to listen to on my way to and from work. So I listen to the morning ones on my way to work and then the night ones on my way home. My commute is about 1 hour either way. Is that enough affirmations work or should I say the affirmations along with the CD too? Obviously it's better to say it along with the CD, I am asking if it is sufficient to just listen to it.