As a new spiritual rebirth being, the fruit of the Spirit should manifest in my life.
"But the fruit of the Spirit is love, joy, peace, longsuffering, gentleness, goodness, faith, meekness, temperance: against such there is no law" (Galatians 5:22-23).
Since "if any man be in Christ, he is a new creature: old things are passed away; behold, all things are become new" (2 Corinthians 5:17), this fruit is the natural evidence of that new life growing in me.