Just as great care is taken in adopting Taqwaa with regards to our stomachs (checking for halal ingredients), so we should adopt Taqwaa regarding our other organs.

Just as we eat only Halal, so we should listen to, look at, touch only that which is halal because each organ is a priceless gift and to misuse these gifts is to show ingratitude of the highest degree.

(Cannot remember who the speaker was)