[2:172] O you who believe, eat of the good things (?ayyibāt) wherewith We have provided you, and give thanks to God if it be Him that you worship.
The permitted (ḥalāl) is that for which there is no [bad] consequence. The good thing (?ayyib) is that thing, the blessing of which is not attributable to any created thing. When the servant finds something that combines these two qualities, it is the permitted and good.
The true meaning of thankfulness to Him is that you do not take a breath in anything other than the pleasure of the Real, so long as the energy given to you by that [permitted and good] food remains.