D&C 5

In a revelation to the Prophet Joseph Smith, as Martin Harris had come to Harmony in hopes to see the plates, the Lord gave a great warning to all saints including myself -

"Verily, I say unto you, that woe shall come unto the inhabitants of the earth if they will not hearken unto my words..."  (Doctrine and Covenants | Section 5:5)

The warning to me is if I ever choose to fall away or not hearken anymore to His words, the promise of woe will following.  That's scary!