Baptism isn't just about new life, but also involves a death. St. Paul gives some suggestions about parts of the Old Adam that must be put to death and buried so that we may walk in the newness of life.
First an attempt to vindicate Martha, and then a call to take time out of our busy lives and be like Mary who sat at the feet of Jesus to hear the Word.
We are saved not be being good, but by faith in our saviour Jesus Christ. This faith is particularly manifested when we show that we are aware that we are sinners in need of his forgiveness, and when we show our contrition for those sins, like the woman in the Gospel today. This happens especially in the sacrament of confession.
Marriage is a vocation, that is, a specific path to holiness and union with God. Holiness is a path of love, and to love means to sacrifice. And through the path of sacrifice, love and holiness, our lives actually become better.