Ye shall know them by their fruits. The fruit of the Spirit must be evident in the life of the prophet. This can be positive, as it recognizes each person as a valuable member of the Body of Christ, and encourages them to walk in their gifts and callings. However, there is a down side. Mistakes can be made.
Pride can enter in.
We are to desire the higher gifts, but not be jealous of someone else who receives them. Jesus set the example of humility. You tolerate that woman Jezebel, who calls herself a prophetess. By her teaching she misleads my servants into sexual immorality and the eating of food sacrificed to idols. I have given her time to repent of her immorality, but she is unwilling.