I do believe the hymns teach true doctrine (see “Identifying Doctrine“). Here’s a bit of “O My Father” (#292, “Hymns”):

I had learned to call thee Father,
Thru thy Spirit from on high,
But, until the key of knowledge
Was restored, I knew not why.
In the heav’ns are parents single?
No, the thought makes reason stare!
Truth is reason; truth eternal
Tells me I’ve a mother there.

When I leave this frail existence,
When I lay this mortal by,
Father, Mother, may I meet you,
In your royal courts on high?

So who bears the life-giving power, it being a power of God? It is certainly not the man. The man cannot bear children. It is the woman – the mother (and consider Mary, the mother of Christ). While man cannot be without the woman, nor the woman without the man, the woman bears the life-giving power, a power of God, which is of the priesthood. While women do not bear the administrative authority of the priesthood, they have an equal role in carrying out the acts of God. Bearing and raising children is an inherent and sacred attribute of what I am sure is the expanse and fullness of the priesthood. So do not think that your role with the priesthood is merely a passerby, one who sits idly back and admires its use and power. In due time and through worthy living you, too, will be exercising a power of God as you create a family, eternally sealed to your husband, and you and him can become like God.

You have more to do with the priesthood than you might think.

Living our life to be like God means to fulfill all the ordinances and make all the covenants required to gain eternal life. These are:

• Baptism
• Confirmation (receiving the Gift of the Holy Ghost)
• Obtaining the priesthood (men)
• Temple endowment
• Celestial marriage (sealing)

After worthily completing these, living righteously to the Celestial standard, and enduring to the end, you are guaranteed eternal life in the highest degree of the Celestial Kingdom, God’s residence. It is promised in Doctrine & Covenants, and then “all that [your] Father has shall be given unto [you].”

Now as you continue to recite the Young Women’s Theme, and consider the attributes mentioned there, also consider your whole and literal role pertaining to the Kingdom of God, the building of Zion, and not only the support of the priesthood in your life, but also the sealing power which will liken both you and your husband to the promises and blessings of the priesthood as you exercise God’s power, delegated to mankind, to raise a family, just as he did. You are chosen daughters of God, a heavenly father who loves you just as and probably more than you will someday love your children. Always strive to live up to this calling. I say these things in the name of Jesus Christ, amen.

Let’s start by going through the offices of the Aaronic and Melchizedek priesthoods. The lesser, or Aaronic priesthood, has three offices: Deacon, Teacher, Priest. It is preparatory for the higher Priesthood of Melchizedek, which contains Elder, High Priest, Patriarch, Seventy, and Apostle.

What happened to the office of Prophet? In this context, there is no distinction between apostle and prophet. The Quorum of the 12 Apostles is a quorum of prophets, seers, and revelators, just as much as “the” prophet is our President of the Church. So one called as an apostle and ordained to the office of  Apostle also becomes a prophet, seer, and revelator, however, does not hold the keys to presiding over the whole Church as the President does (today, Thomas S. Monson). If you want details, the Bible Dictionary’s entry on “Melchizedek Priesthood” explains it clearly.

Each office in the Melchizedek Priesthood is likewise preparatory to the offices above it whereby more keys are given. If the man is living worthily, each step of the way is a learning experience. He learns how to use it properly, according to God’s will. He learns the effects of it and gains a deeper understanding as he develops spiritually. These priesthoods are administrative: ordinances performed in the Church must be overseen by a Melchizedek Priesthood holder (give or take some witnesses, depending) and sealed by the Holy Spirit of Promise (D&C 132:7).

Most of that should have been review. Now let’s look deeper. Those are the offices of the priesthoods. That is true, however, is that all? No. Those are the offices to which we ordain men in this world.  There is one other. What is it?

1. Atonement (v. 13)

2. Resurrection (v. 14)

3. Judgment (v. 15)

4. Faith

5. Repentance (v. 19)

6. Baptism

7. Holy Ghost

8. Endurance (v. 16)
   

As stated in 3 Nephi 27:13-21 by the Lord Jesus Christ himself when He visits the people in America. Items 4-7 are the fundamental principles and ordinances of the Gospel.