"….We ask that through perfect wisdom and spiritual understanding, you should reach the fullest knowledge of his will and so be able to lead a life worthy of the Lord, a life acceptable to him in all its aspects." (Colossians 1: 9 – 10)
The fruit of perfect wisdom and spiritual understanding is discernment of God's will for our life. Perfect wisdom and spiritual understanding come from regular reading and reflection of God's word and prayer. This leads to a clear understanding that God's will for us is not arbitrary or tyrannical but the best policy. When we live by discernment of spirits, our decisions are guided by the question – "What is God's will for me here and now?"
Without the gift of discernment of spirits, it is impossible "to lead a life worthy of the Lord, a life acceptable to him in all its aspects."