Answer: God gives the Holy Spirit to those who obey Him, (verse 32).
MORE INFORMATION AND/OR OTHER SCRIPTURE REFERENCES:
1 Thessalonians 4:8: "Therefore, he who rejects this instruction does not reject man but God, Who gives you His Holy Spirit."
1 John 3:24: "Those who obey His commands live in Him, and He in them. And this is how we know that He lives in us: We know it by the Spirit He gave us."