After Jesus' death, His apostels carried on for a time. Eventually, they died and the Great Apostasy began. During this time, many of Jesus' plain and precious doctrines were changed or lost. Not quite 200 years ago, these beautiful lost truths were restored. We can discover the difference between Jesus' restored truths and worldly falsehoods. We can beware of the evil behind the smiling eyes and see wolves dressed as sheep for what they really are.
"Then said Jesus to those Jews which believed on him, If ye continue in my word, then are ye my disciples indeed; And ye shall know the truth, and the truth shall make you free." John 8:31-32
"And whoso treasureth up my word, shall not be deceived, for the Son of Man shall bcome, and he shall send his angels before him with the great sound of a trumpet, and they shall gather together the remainder of his elect from the four winds, from one end of heaven to the other," JS Matthew 1:37.
The adversary wants us to stumble, fall, and fail.
"Wo unto them that call evil good, and good evil, that put darkness for light, and light for darkness, that put bitter for sweet, and sweet for bitter!" 2 Nephi 15:20
"Wherefore, because that Satan rebelled against me, and sought to destroy the agency of man, which I, the Lord God, had given him, and also, that I should give unto him mine own power; by the power of mine Only Begotten, I caused that he should be cast down; And he became Satan, yea, even the devil, the father of all lies, to deceive and to blind men, and to lead them captive at his will, even as many as would not hearken unto my voice." Moses 4:3-4
We don't have to hope we are right; Heavenly Father gave us the instruction manual.
"Wherefore, all things which are good cometh of God; and that which is evil cometh of the devil; for the devil is an enemy unto God, and fighteth against him continually, and inviteth and enticeth to sin, and to do that which is evil continually. But behold, that which is of God inviteth and enticeth to do good continually; wherefore, every thing which inviteth and enticeth to do good, and to love God, and to serve him, is inspired of God. Wherefore, take heed, my beloved brethren, that ye do not judge that which is evil to be of God, or that which is good and of God to be of the devil. For behold, my brethren, it is given unto you to judge, that ye may know good from evil; and the way to judge is as plain, that ye may know with a perfect knowledge, as the daylight is from the dark night. For behold, the Spirit of Christ is given to every man, that he may know good from evil; wherefore, I show unto you the way to judge; for every thing which inviteth to do good, and to persuade to believe in Christ, is sent forth by the power and gift of Christ; wherefore ye may know with a perfect knowledge it is of God. But whatsoever thing persuadeth men to do evil, and believe not in Christ, and deny him, and serve not God, then ye may know with a perfect knowledge it is of the evil; for after this manner doth the devil work, for he persuadeth no man to do good, no, not one; neither do his angels; neither do they who subject themselves unto him. And now, my brethren, seeing that ye know the light by which ye may judge, which light is the light of Christ, see that ye do not judge wrongfully; for with that same judgment which ye judge ye shall also be judged. Wherefore, I beseech of you, brethren, that ye should search diligently in the light of Christ that ye may know good from evil; and if ye will lay hold upon every good thing, and condemn it not, ye certainly will be a child of Christ," Moroni 7:12-19.
Finally, if we allow some quiet in our lives, the Holy Ghost can help us discern truth.
"And by the power of the Holy Ghost ye may aknow the btruth of all things," Moroni 10:5.
"But ye are commanded in all things to ask of God, who giveth liberally; and that which the Spirit testifies unto you even so I would that ye should do in all holiness of heart, walking uprightly before me, cconsidering the end of your salvation, doing all things with prayer and thanksgiving, that ye may not be seduced by evil spirits, or doctrines of devils, or the commandments of men; for some are of men, and others of devils. Wherefore, beware lest ye are deceived; and that ye may not be deceived seek ye earnestly the best gifts, always remembering for what they are given;" Doctrine and Covenants 46:7-8.