3 Nephi 14

 For those that believe that grace alone are we saved, the Savior taught - 

"Enter ye in at the strait gate; for wide is the gate, and broad is the way, which leadeth to destruction, and many there be who go in thereat;

14 Because strait is the gate, and narrow is the way, which leadeth unto life, and few there be that find it.

15 Beware of false prophets, who come to you in sheep’s clothing, but inwardly they are ravening wolves.

16 Ye shall know them by their fruits... "  (3 Nephi 14:13–16)

In my mind, it is clear that there are conditions and that each of us also has obligations.