PSALM FORTY-SEVEN , Discernment of spirits.

1 Clap your hands , all you peoples;shout to God with loud songs of joy.
2 For the LORD , the Most High, is awesome, a great king over all the earth.    (Psalm 47 :1-2)

This is the word of the Lord, verse one is an instruction , verse two is the reason.
People  who can't or will not worship God, may be under the wrong spirit.
People who can't raise their hands clap, or shout with loud songs of joy,
may be under the wrong spirit.
But people who spontaneously , clap their hands and shout to God
with loud songs of joy may well be worshiping in Spirit and Truth.
1 John 4:1 KJV
Beloved, believe not every spirit, but try the spirits whether they be of God.
1 John 4:1 New RSV
Beloved, do not believe every spirit, but test the spirits to see
whether they are from God.

Psalm 89:16  New Catholic Version St Joseph Edition
Blessed are the people who know how to acclaim you, O, Lord,
who walk in the light of your countenance.

Romans 8:37 NIV
In all these things we are more than conquerors, through him who loved us.
For I am convinced that neither death not life, neither angels nor demons,
neither the present nor the future, nor any powers, neither height nor depth,
nor anything else in all creation, will be able to separate us from the 
love of God that is in Christ Jesus our Lord.

So if you know someone who exudes the love of Christ,
you have discerned the Spirit that they have chosen to live in.