How can we test the spirits according to 1 John?

In 1 John, believers are urged to test the spirits to discern whether they are from God. This entails a careful examination of the teachings presented and comparing them with the truth of the Gospel as delivered by the apostles. Specifically, John instructs that any spirit or teacher proclaiming Jesus Christ’s incarnation and affirming His lordship is from God. Additionally, the demonstration of love is a critical aspect of this testing, as a true spirit from God will manifest in love for others, aligning with the nature of God as love.