It is better to deny oneself (yet another reason why same-sex marriage is contrary to God's plan)

Matthew 5:29 And if thy right eye offend thee, pluck it out, and cast it from thee: for it is profitable for thee that one of thy members should perish, and not that thy whole body should be cast into hell.

 30 And if thy right hand offend thee, cut it off, and cast it from thee: for it is profitable for thee that one of thy members should perish, and not that thy whole body should be cast into hell.

Or

3 Nephi 12:30 For it is better that ye should deny yourselves of these things, wherein ye will take up your cross, than that ye should be cast into hell.

My interpretation: It is better to deny oneself of harmful physical appetites and enter into heaven than satisfy these appetites and be cast into hell.  This seems to be in conflict with the modern principle of same-sex marriage which teaches that it a person is born with a specific type of sexual urge, then it is appropriate to satisfy this urge and the government will support anyone who wishes to behave this way, no matter what the cost to society ends up being.

Mini purpose of life

https://www.lds.org/scriptures/pgp/moses/6.55

55 And the Lord spake unto Adam, saying: Inasmuch as thy children are conceived in sin, even so when they begin to grow up, sin conceiveth in their hearts, and they taste the bitter, that they may know to prize the good.

I read that as: once people become teenagers and their bodies start to mature, they will be faced with a new temptations that will be contrary to God's will. Each person's temptation will probably be different.

The precepts of men

• 2 Nephi 4:34

  34 O Lord, I have trusted in thee, and I will trust in thee forever. I will not put my trust in the arm offlesh; for I know that cursed is he that putteth his trust in the arm of flesh. Yea, cursed is he that putteth his trust in man or maketh flesh his arm.

• Jeremiah 17:5

  5 ¶Thus saith the Lord; Cursed be the man that trusteth in man, and maketh flesh his arm, and whose heart departeth from the Lord.
• • 2 Nephi 28:31

    31 Cursed is he that putteth his trust in man, or maketh flesh his arm, or shall hearken unto the precepts of men, save their precepts shall be given by the power of the Holy Ghost.
  • • 2 Nephi 28:30

      30 For behold, thus saith the Lord God: I will give unto the children of men line upon line, preceptupon precept, here a little and there a little; and blessed are those who hearken unto my precepts, and lend an ear unto my counsel, for they shall learn wisdom; for unto him that receiveth I will give more; and from them that shall say, We have enough, from them shall be taken away even that which they have.
    • • 2 Nephi 28:26

        26 Yea, wo be unto him that hearkeneth unto theprecepts of men, and denieth the power of God, and the gift of the Holy Ghost!
      • • Doctrine and Covenants 45:29

          29 But they receive it not; for they perceive not the light, and they turn their hearts from me because of the precepts of men.
        • • 2 Nephi 28:5

            5 And they deny the power of God, the Holy One of Israel; and they say unto the people: Hearken unto us, and hear ye our precept; for behold there is no God today, for the Lord and the Redeemer hath done his work, and he hath given his power unto men;