We imitate Christ’s death by being buried with him in baptism. If we ask what this kind of burial means and what benefit we may hope to derive from it, it means first of all making a complete break with our former way of life, and our Lord himself said that this cannot be done unless a man is born again. In other words, we have to begin a new life, and we cannot do so until our previous life has been brought to an end. When runners reach the turning point on a racecourse, they have to pause briefly before they can go back in the opposite direction. So also when we wish to reverse the direction of our lives there must be a pause, or a death, to mark the end of one life and the beginning of another.
via the book On the Holy Spirit by Saint Basil, bishop.