Heb 4:12 For the word of God is quick, and powerful, and sharper than any two-edged sword, piercing even to the dividing asunder of soul and spirit, and of the joints and marrow, and is a discerner of the thoughts and intents of the heart.
Apparently you guys don't just condemn using the scripture 'alone'...You condemn using the scripture 'at all', unless you can squeeze something out of it that may (or may not) remotely bolster your theory on what God taught us...
One interesting thing is that apparently your early church knew far better than you...The guy that wrote the original Catholic bible, Jerome, knew that we have a body and a soul and a spirit...And so did the Douay/Rheims people...Here's Jerome's writing...
Heb 4:12 For the word of God is living and effectual and more piercing than any two edged sword; and reaching unto the division of the soul and the spirit, of the joints also and the marrow: and is a discerner of the thoughts and intents of the heart.