How do we know that God knows who are His?

The certainty that God knows who are His is repeatedly affirmed in scripture. For instance, in 2 Timothy 2:19, it says, 'The Lord knows those who are His,' indicating that God’s awareness is not dependent on man’s actions or acknowledgment. Furthermore, throughout the passages in Matthew and Revelation regarding the church and its struggles, God’s knowledge of His elect provides comfort and assurance amidst trials. He is not trying to discover who belongs to Him; He knows them intimately and ensures their preservation through His grace and power.