This is a picture of the office standard for a meter.
If I have an object in my hand and want to know its length, I need to discern. In order to discern there must be a standard. The official standard is above.
A Christian must also have a standard in order for us to have discernment. Here is an article from Arminian Today on this topic. May we today and every use discernment according to the standard of the Bible.
"Needed: Biblical Discernment
Proverbs 2:3-5 (NKJV) reads:
3 Yes, if you cry out for discernment,
And lift up your voice for understanding,
4 If you seek her as silver,
And search for her as for hidden treasures;
5 Then you will understand the fear of the Lord,
And find the knowledge of God.