Humble servant

The apostles said to the Lord, "Increase our faith!"
And the Lord said, "If you had faith like a grain of mustard seed, you could say to this mulberry tree, 'Be uprooted and planted in the sea,' and it would obey you. Will any one of you who has a servant plowing or keeping sheep say to him when he has come in from the field, 'Come at once and recline at table'? Will he not rather say to him, 'Prepare supper for me, and dress properly, and serve me while I eat and drink, and afterward you will eat and drink'? Does he thank the servant because he did what was commanded? So you also, when you have done all that you were commanded, say, 'We are unworthy servants; we have only done what was our duty.'"

Luke 17:5-10

Jesus gives the work of a servant as an answer to the apostles' lack of faith. He does not say "hear and know" he says "hear and obey." The work that God gives us is good and does accomplish his purpose for it. If we have done the duty God has given us, we don't look for another reward, say of praise or position, but the work itself is the reward. It is a gift that comes down from the Father of lights to grow our faith.
So the very duty that God gives us is himself and he is forming us into the image of his son. Just as Christ "learned obedience through what he suffered," so we also are made perfect through our duty as servants and our suffering with him. Our work is not meritorious, but forming. We do not work for some thing to be held in the hand or received as a thing apart from very God. There is no salvation outside Christ, not a gift given other than his own being. When he gives us the gift of faith, he gives himself. When he gives us grace, he gives himself. When he gives us work, he gives himself and we grow into him who is our head. If his very life is our faith and our work, we should rightly say, "we are unworthy servants; we have only done what was our duty."

Blood curse

God pronounced a blood curse on the royal family of Judah in Jeremiah 22:

Is this man Coniah a despised, broken pot,
a vessel no one cares for?
Why are he and his children hurled and cast
into a land that they do not know?
O land, land, land,
hear the word of the Lord!
Thus says the Lord:
"Write this man down as childless,
a man who shall not succeed in his days,
for none of his offspring shall succeed
in sitting on the throne of David
and ruling again in Judah.

This is the same Coniah (Jechoniah) that shows up in Matthew's genealogy of Christ:

and Josiah the father of Jechoniah and his brothers, at the time of the deportation to Babylon...and Jacob the father of Joseph the husband of Mary, of whom Jesus was born, who is called Christ.

Of course, Joseph is only Jesus' legal father, but still the inheritance comes down through the father and Joseph's line has been cursed.  In step the daughters of Zelophehad.

The names of his daughters were: Mahlah, Noah, Hoglah, Milcah, and Tirzah. And they stood before Moses and before Eleazar the priest and before the chiefs and all the congregation, at the entrance of the tent of meeting, saying, "Our father died in the wilderness. He was not among the company of those who gathered themselves together against the Lord in the company of Korah, but died for his own sin. And he had no sons. Why should the name of our father be taken away from his clan because he had no son? Give to us a possession among our father's brothers."

Moses brought their case before the Lord. And the Lord said to Moses,"The daughters of Zelophehad are right. You shall give them possession of an inheritance among their father's brothers and transfer the inheritance of their father to them. And you shall speak to the people of Israel, saying, 'If a man dies and has no son, then you shall transfer his inheritance to his daughter.

and in Numbers 36:

And every daughter who possesses an inheritance in any tribe of the people of Israel shall be wife to one of the clan of the tribe of her father, so that every one of the people of Israel may possess the inheritance of his fathers.

Mary is an heiress to the line of David also, but through Nathan, Solomon's brother, thus bypassing the blood curse and allowing Gabriel to say to Mary,

"Do not be afraid, Mary, for you have found favor with God. And behold, you will conceive in your womb and bear a son, and you shall call his name Jesus. He will be great and will be called the Son of the Most High. And the Lord God will give to him the throne of his father David, and he will reign over the house of Jacob forever, and of his kingdom there will be no end."

There will your heart be

Vapor of vapors, says the Preacher. Vapor of vapors! All is vapor.

Ecc 1:2

Sell your possessions, and give to the needy. Provide yourselves with moneybags that do not grow old, with a treasure in the heavens that does not fail, where no thief approaches and no moth destroys. For where your treasure is, there will your heart be also.

Luke 12:33-34

The things of this world are transitory, a vapor. Not to say matter is evil; God made it and called it good. But it's not perfect. It is corruptible. To steal a dialog from George MacDonald:

"Why not lay up for ourselves treasures upon earth?" 

"Because there the moth and rust and the thief come." 

"And so we should lose those treasures!" 

"Yes; by the moth and the rust and the thief." 

"Does the Lord then mean that the reason for not laying up such treasures is their transitory and corruptible nature?" 

"No. He adds a For: 'For where your treasure is, there will your heart be also.'"

"Of course the heart will be where the treasure is; but what has that to do with the argument?" 

This: that what is with the treasure must fare as the treasure; that the heart which haunts the treasure-house where the moth and rust corrupt, will be exposed to the same ravages as the treasure, will itself be rusted and moth-eaten. Many a man, many a woman, fair and flourishing to see, is going about with a rusty moth-eaten heart within that form of strength or beauty.