Michelangelo, Splinter and others in “Unfinished Business”

Are you...a ghost?

My spirit has become detached from my body but that body still lives.

You're alive? Where are you, sensei? Let us help you.

You cannot yet. There are things you must overcome. If you cannot find your inner spiritual strength, you will not stand a chance against the Shredder.

But, Master Splinter, my leg injury- it's physical. Until I heal...

We choose what holds us back and what moves us forward. You will all learn this. Each of you must journey out alone to face your spiritual adversary. Raphael, your temper is like a fire that you must learn to focus for power. Michelangelo, your mind is overrun with distractions. Learn to be strong and calm like the forest. Donatello, you rely too much on your mind and not on your body. Be strong like the mountain. Leonardo, you must be the leader in body and spirit. Be like the wind. Let nothing weigh you down. Sleep now, my sons. For your greatest trial awaits on the spiritual plane. For the challenges you face there will be just as dangerous as you face in the real world. Be warned.