It is in 2 Nephi 2:27
Wherefore, men are free according to the flesh; and all things are given them which are expedient unto man. And they are free to choose liberty and eternal life, through the great Mediator of all men, or to choose captivity and death, according to the captivity and power of the devil; for he seeketh that all men might be miserable like unto himself.
This scripture puts the cards on the table quite candidly. The prophet who is speaking (Lehi) says that many key choices we make lead us into following one of two paths: Captivity & death through the adversary's decisions or liberty and eternal life through Christ's admonitions!
We will all be tempted, it is just a fact of life. Even Christ himself was tempted! In Matthew we read the story of his temptation...