How do we know the concept of the first fruits is true?

In Revelation 14:4, the believers are described as the first fruits, indicating they are the initial recipients of God's grace among humanity. This notion is rooted in the Old Testament, where the first fruits were offered to God as acknowledgment of His provision and blessing (Exodus 23:19). The first fruits are symbolic of both a divine claim and a promise of future harvest. It emphasizes that God's elect, who are redeemed by Christ, are set apart and consecrated to Him even before the final harvest is celebrated.