From YOUCAT, fact 342:
342: Are we all supposed to become “saints”?
Yes. The purpose of our life is to be united with God in love and to correspond entirely to God’s wishes. We should allow God “to live his life in us” (Mother Teresa). tHIS IS what it means to be holy: a “saint.”
Every man asks himself the question: Who am I and why am I here, how do I find myself? Faith answers: Only in HOLINESS does man find real harmony between himself and his Creator. Holiness, however, is not some sort of self-made perfection; rather, it is union with the incarnate love that is Christ. Anyone who gains new life in this way finds himself and becomes holy.