You should be thrilled.
You’re going to travel and see new places. You’ll be responsible and accountable for your work like never before. You’ll make new friends and tons of memories. Best of all, you’ll learn a ton.
It’s a lot like you’re undergraduate college years, really. Enjoy it. Work your hardest. And cherish every moment.
But after your fourth year doing the same stuff that used to be new, exciting and rewarding, you need to graduate. Just like college. Move on. Start your life. Because the people that stay in Big Four consulting past four years are just like the people that stay in college past four years. Suckers.