We cannot only speak about sight. But also about not seeing. It is not all the time that God permits us to use a gift. Sometimes the job is on someone else. Humble yourself. Even Christ said when asked to use his gifts, "my time has not yet come".
We always inquire of Holy Spirit in all spiritual giftings. In actuality it is Holy Spirit and not us, we are only the vessel surrendering to Holy Spirit.
How do you tell when it's you and not Holy Spirit? You feel no leading, no push, no unction. You move to use similar revelations or practices but never inquire of Holy Spirit.
Sometimes we can even feel our own emotions about someone or knowledge that we have of that person. This is false prophecy. Also we may use our own experiences to predict, this is a mistake.
As a seer, wait upon the Holy Spirit. Be patient and not quick to conclusions. Some things you see by Spirit are metaphorical and need interpretation, stop an inquire of Holy Spirit.
Lastly check your own intentions of using your spiritual gifts. If it's to receive kudos, to display power, to shame, to cause fear or any malintent stop and deal with what is going on inside of you. Don't pervert the gifts of Most High.
“Son of man, prophesy against the prophets of Israel that prophesy, and say thou unto them that prophesy out of their own hearts, Hear ye the word of the LORD; Thus saith the Lord GOD; Woe unto the foolish prophets, that follow their own spirit, and have seen nothing!”