Preposition
in the thick of
(idiomatic) In the middle of (something difficult).
Revelations come when you're in the thick of it, pitting yourself up against something larger than yourself. Frank Langella
The panting breathless haste and vehemence of a man struggling in the thick of battle for life and salvation; this is the mood he is in! Thomas Carlyle
I'm sick of love but I'm in the thick of it. Bob Dylan
Death used to announce itself in the thick of life but now people drag on so long it sometimes seems that we are reaching the stage when we may have to announce ourselves to death. It is as though one needs a special strength to die, and not a final weakness. Ronald Blythe
My concept of an advice giver had been a therapist or a know-it-all, and then I realized nobody listens to the know-it-alls. You turn to the people you know, the friend who has been in the thick of it or messed up - and I'm that person for sure. Cheryl Strayed
The Mammoth we attacked was not Rommel's after all. [...] Rommel himself, we'll learn later, was not in that camp and never had been. At the time of our raid, he was with the 15th Panzer Division, somewhere west of Kidney Ridge, in the thick of the fighting at El Alamein. Steven Pressfield