If we can understand anxiety in such a way that we can use the mind to properly attend to the disorder it is born from we might being to understand anxiety's relationship to pleasure.
Anxiety, in this sense, is a form of suffering, or displeasure, and so traditionally pleasure has been seen as the opposite of anxiety.
We tend to move FROM that which makes us uncomfortable, whether physically in the real world or psychologically, and move towards that which we feel will give us a great pleasure.
If we can learn not to immediately escape from our psychological anxiety, then what role should pleasure have?
What happens when one ceases to involuntarily seek pleasure and instead observes the DESIRE for pleasure as though it is itself a form of anxiety that is causing us to try to escape towards it?
Isn't this related to addiction?
Isn't it the escape from anxiety towards pleasure that is the pattern the addict cannot break?
"Can I observe my desire to seek pleasure without moving towards it?"
Don't just ask the question, try to do it, and see what becomes of the process.
Here, from this new perspective, we can understand the relationship between anxiety or displeasure and pleasure.