How do we know if we have received the right spirit?

In 1 John 4:1-3, believers are instructed to test the spirits to determine whether they are from God. The true Spirit, the Comforter sent from Jesus, will convict individuals of their sin, affirm the righteousness of Christ, and confirm the reality of judgment. When a spirit encourages self-deception or claims that one’s works are sufficient for salvation, it is a false spirit. The true Spirit points to Christ's finished work rather than human effort, thus aligning with the true gospel's message of grace.