Source

Romans 8:27

27 And he who searches our hearts knows the mind of the Spirit, because the Spirit intercedes for God’s people in accordance with the will of God.

God knows the hearts of every person in this world. God knows if someone is sincere, if someone is a liar, if there is evil in his heart or if there is love.

There are people who try to deceive with false humility or with flattering words, they try to earn the trust or love of others but with lies, and God knows that the reality is that in the heart of that person lies.

When we are intimately in communion with the Holy Spirit, he can warn us of those people who try to win our trust with lies. We can know who are the people around us and the intentions they really have towards us.