And these are they which are sown on good ground; such as hear the word, and receive it, and bring forth fruit, some thirtyfold, some sixty, and some an hundred.
Mark 4:20 (KJV)
The Word of God is the fuel for our born again spirit, meaning that as we contemplate the Word, as we meditate on it, as we pray to have a revelation of it through the Holy Spirit, gradually our born again spirit becomes fully alive within us. When our spirit is alive within us, we live more out of who we are in Christ than out of who we used to be in the flesh. Renewing our minds and hearts in the Word is crucial for us to bring forth the fruits of all that has been so freely made available to us by grace.