Believe.

"And the Lord said unto him: Believest thou the words which I shall speak?
     "And he answered: Yea, Lord, I know that thou speakest the truth, for thou art a God of truth, and canst not lie.
     "And when he had said these words, behold, the Lord showed himself unto him, and said: Because thou knowest these things ye are redeemed from the fall; therefore ye are brought back into my presence; therefore I show myself unto you."

-Ether 3:11-13


"...[A]nd now, if you believe all these things see that ye do them."

-Mosiah 4:10