1 Peter 1:23

Having been born again, not of corruptible seed but incorruptible, through the word of God which lives and abides forever.   

A seed contains all the nutrients it needs to start a new life until it is planted.  When we are born again, God replaces the old bad seed and plants new, incorruptible seed.  A seed has unlimited potential to spread its roots and grow.  The more nutrients (the Word) it takes up, the larger the plant will become.  Our job is to nourish that seed with the Word of God and grow and prosper in our lives as our soul prospers.  We need to see ourselves as a seed without limits in fertile soil.