How do we know we are chosen by God?

The knowledge of being chosen by God is anchored in the believer's faith and the experience of His grace, as indicated in John 15:19, where Jesus said, 'If ye were of the world, the world would love his own: but because ye are not of the world, but I have chosen you out of the world, therefore the world hateth you.' This divine selection results in a fundamental change in identity, causing believers to experience both the love of God and the accompanying hatred from the world. Such a response serves as a confirmation of their status as friends and heirs in Christ. Furthermore, the persistence of faith amidst worldly opposition reflects the reality of this divine choice, affirming that they are not only called but also equipped to bear witness to God's grace and truth.