Firstfruits

"Of His own will He brought us forth by the word of truth, that we might be a kind of firstfruits of His creatures." James 1.8

Through the Lord Jesus, the Word, each one of those who are born of the Holy Spirit is God's first fruits, His firstborn, His tithe, His property, holiness to Him, in short, they are children of God.
Do you think this a small thing?
Then, wait until you get to the glorious New Jerusalem to see what the Almighty has in store for each of His own.

Holiness and firstfruits

"Israel was holiness to the LORD, the firstfruits of His increase..." Jeremiah 2.3

Israel had double honour before God: it was the firstfruits and holy. Those who are born of the Spirit of God have the same characteristics: they are the first fruits and the sole property of the Almighty. Therefore, the Holy Spirit guarantees that everyone who is born of God overcomes the world (1 John 5.4).

Israel was...

"Israel was holiness to the LORD, the firstfruits of His increase. All that devour him will offend; disaster will come upon them, says the LORD." Jeremiah 2.3

To be holy to the LORD means to be His property. To be the first fruits of the harvest of the Lord means to be His tithe. That is how Israel was before the Most High. What is your situation before the LORD: are you or were you consecrated unto the LORD? Are you or were you the tithe of the LORD?

Broken Spirit

"The sacrifices of God are a broken spirit,
A broken and a contrite heart—
These, O God, You will not despise." Psalms 51:17

God can only fill one with His Spirit when one empties oneself. He doesn't require perfection or holiness, but surely humbleness to recognise one's dependence on His guidance.