1.17-You reap what you sow.

1.17-

The way to this peace is that when we are rejected move on to places where we can be fruitful.

Those who reject the peaceful will have regrets.  Justice means that what we sow is what we reap.  God is God of justice and righteousness.  

Psalm 9.

⁷ But the Lord ^[f]abides forever;
He has established His throne for judgment,
⁸ And He will judge the world in righteousness;
He will execute judgment for the peoples with equity.
^9 [g]The Lord also will be a stronghold for the oppressed,
A stronghold in times of trouble;
¹⁰ And ^[h]those who know Your name will put their trust in You,
For You, O Lord, have not forsaken those who seek You.

In 1853 a collection of “Ten Sermons of Religion” by Parker was published and the third sermon titled “Of Justice and the Conscience” included figurative language about the arc of the moral universe: ¹

Look at the facts of the world. You see a continual and progressive triumph of the right. I do not pretend to understand the moral universe, the arc is a long one, my eye reaches but little ways. I cannot calculate the curve and complete the figure by the experience of sight; I can divine it by conscience. But from what I see I am sure it bends towards justice.

Civil rights champion Martin Luther King, Jr. once delivered a powerful speech with this resonant line:

The arc of the moral universe is long, but it bends toward justice.

When God was telling the children of God to be sure and work for the good of their brethren when the time came for them to help.  If they didn’t step and help their brothers when needed they would find out this truth.

“Be sure your sins will find you out.”

Galations 6.

⁶ The one who is taught the word is to share all good things with the one who teaches him. ⁷ Do not be deceived, God is not mocked; for whatever a man sows, this he will also reap. ⁸ For the one who sows to his own flesh will from the flesh reap corruption, but the one who sows to the Spirit will from the Spirit reap eternal life. ⁹ Let us not lose heart in doing good, for in due time we will reap if we do not grow weary. ¹⁰ So then, ^[b]while we have opportunity, let us do good to all people, and especially to those who are of the household of the faith.

John 12.
²⁴ Truly, truly, I say to you, unless a grain of wheat falls into the earth and dies, it remains alone; but if it dies, it bears much fruit. 

Matthew 7.
¹⁷ So every good tree bears good fruit, but the bad tree bears bad fruit. ¹⁸ A good tree cannot produce bad fruit, nor can a bad tree produce good fruit. ¹⁹ Every tree that does not bear good fruit is cut down and thrown into the fire. ²⁰ So then, you will ^[m]know them by their fruits.