Zhou Tian also knew that upon reaching the Divine Realm, he would eventually adapt to the situation, though at least at the moment, he hadn't adjusted yet. Therefore, after spending so much time to absorb that Deityhood, Zhou Tian needed to adjust his mindset.
It's not that Zhou Tian couldn't cultivate at this moment, but given the situation, he felt that even if he did cultivate, it wouldn't yield much result. Therefore, rather than jumping into cultivation, he thought it was better to first steady his mindset.
There's no need for special psychological recovery because Zhou Tian simply felt some discomfort from doing one thing for a long time, and besides that, he didn't suffer any loss at that time. Thus, as long as he slowly interacted with the Outside World for a while, Zhou Tian would naturally adjust his state of mind, and that initial discomfort wouldn't have an impact on him.
