Fruit of the Spirit

I've often wondered how I would know if I am getting spiritually mature. The bible (kjv) talks about the fruit of the spirit.

Love

Joy

Peace

Longsuffereing

Goodness

Gentleness

Meekness

Faith

Temperance

There are scriptures relating to them in Galatians 5:22-23 and Ephesians 5:9.
I have often heard people call it fruits but it doesn't say 'fruits' in the scriptures. It's all one fruit apparently.
It got me to thinking how I am striving to be the best finished product I can be as far as the Lord is concerned. Fruit ripens best when its closest to the sun.
It's my desire to be close to the Son.
Like a tree planted by the rivers of the water I hope to bring forth that fruit in my season.
What a day that will be...