Thérèse of Lisieux found purpose in her darkness, and union with God by identifying with unbelievers and loving them.
St. Therese of the Child Jesus
Solemnity of All Saints: What Does It Mean To Be A Saint?
The saints teach us what the meaning of life really is. By their unique deeds and words, they show forth the love of God in its radiant depth and beauty, and point us toward not simply the fullness of living in the here and now, but the goal of every human person: eternal life in union with God.