God intended us to have dominion over our lives, to be the captains of our souls.
Of course, in the ship of life, you cannot make port unless all sails are set. You must pursue the spiritual life wholeheartedly. You cannot expect to reach port if you are faithful in your prayers and meditations for a time, and then for a time you forget God.
You are the captain of your soul when you can say with Jesus:
I and my Father are one…the Father that dwelleth in me, he doeth the works…