The Epic Life- Doctrine and Covenants 58:27-28, John 14:2

Verily I say, men should be anxiously engaged in a good cause, and do many things of their own free will, and bring to pass much righteousness;
For the power is in them, wherein they are agents unto themselves. And inasmuch as men do good they shall in nowise lose their reward.

In my Father’s house are many mansions: if it were not so, I would have told you. I go to prepare a place for you.

COMMENTARY

Men should be anxiously engaged in a good cause, and do many things of their own free will. For the power is in them, wherein they are agents unto themselves.
Tied in with our desire for a life that is epic and meaningful is a desire for a life that is independent. We want to be an agent unto ourselves, not to be someone else’s pawn. And to be clear, freely electing to be a servant to my God is not at all the same as being some manually-controlled pawn. I can choose to be a servant and still retain my individuality.
And as we see in this verse, God’s intent is for us to have that independence. He wants us to freely choose many good works for ourselves. Our deepest spiritual joy does not come from sitting back and just idly thinking about God, it comes from receiving a charter and giving our all to to fulfill it!

In my Father’s house are many mansions
The world would try to convince us that being God’s servant is restrictive, destroys individuality, and turns us all into identical robots. But nothing could be further from the truth. There are many mansions in heaven, many different domains of good, many paths within His garden. The ways to champion God’s will are legion, and He intends for us to freely choose our own corner of the field to work in. Thus my great adventure of good works is very distinct and unique from your own, but both of them are still good. And when we find the good path that uniquely calls to us and give ourselves to it with all the power we have, then we find ourselves walking the truly epic life.

Our Dual Nature- Moses 6:55-56

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.
And it is given unto them to know good from evil; wherefore they are agents unto themselves, and I have given unto you another law and commandment.

COMMENTARY

They taste the bitter, that they may know to prize the good
How do you know that you want to go to heaven? Because you have been told it is a place of peace and love. How do you know that you do not want to go to hell? Because you have been told it is a place of suffering and sorrow. But how do you know that you want peace and love, rather than suffering and sorrow? Because you have experience both, and therefore know which experience is pleasurable and which is painful. Even before you committed your first sin, you were educated on the differences between the two so thoroughly that you cannot mistake one for the other.
If you had never received that education, words like peace, love, pleasure, good, suffering, sorrow, pain, and evil would merely be words. Meaningless, and impossible to judge one against the other.

Wherefore they are agents unto themselves
So what is our purpose here on Earth? To gain knowledge, to learn the difference between good and evil, and to choose the better part. Because of our awareness we are able to choose a path. Not only that, but we can also turn to another path if we later change our choice. We are free to be our own agent, to steer ourselves to our own destination. We are not be some dumb entity that is puppeteered into its destiny, we choose it for ourselves.
And that is truly something worthy. For this, a God would die.