Find many believe they have discernment which is good but there are differences between discernment and the discernment of spirits. The latter is from the Holy Spirit who guides us to all truth. When the manifestations of the spiritual gifts are stated, it says given by the Spirit (I Cor 12).
Amen, I suppose for a example I will try to explain.
Sometimes you see a person, and in your spirit the truth of what is driving that person rises up in you.
You know beyond a doubt one of two things, the person is a Spirit filled person of God, or something dark is resting on their being.
My son and I were out, and I looked at a man.
I became overwhelmed in knowing what dark things he was doing.
I had never seen the man before, so when we left I went to my phone and checked for pedophiles in my area.
His face popped up immediately.
I told my Son the man was one before we left.
He was no threat to us as my Son is a grown Man yet still the evil that man had was very strong.
Sometimes you do not know what they are or what is pushing their spirit
you just know it is dark.
There have been times it has taken years to find out, yet in Gods time He will reveal the truth.
One thing for certain is, the gift is The Holy Spirit guiding you in your walk for his purposes.
We do not discern anything ourselves or when we want to show off.
That is fake.
The Gifts are given by God at his time.
Even our faithful Prayer can help others, it does not take a mircial worker to earnestly pray for someone and have faith it will come to pass.
Once a person knows they have been gifted, the Holy Spirit will give increase of the Gift or gifts, but I would pray for God's Wisdom in all things.