Pope Francis's Lenten message offers St. Therese of Lisieux as an example of how the saints are not indifferent to us:

The prayers of the Church on earth establish a communion of mutual service and goodness which reaches up into the sight of God. Together with the saints who have found their fulfilment in God, we form part of that communion in which indifference is conquered by love. The Church in heaven is not triumphant because she has turned her back on the sufferings of the world and rejoices in splendid isolation. Rather, the saints already joyfully contemplate the fact that, through Jesus’ death and resurrection, they have triumphed once and for all over indifference, hardness of heart and hatred. Until this victory of love penetrates the whole world, the saints continue to accompany us on our pilgrim way. Saint Therese of Lisieux, a Doctor of the Church, expressed her conviction that the joy in heaven for the victory of crucified love remains incomplete as long as there is still a single man or woman on earth who suffers and cries out in pain: “I trust fully that I shall not remain idle in heaven; my desire is to continue to work for the Church and for souls” (Letter 254, July 14, 1897).

We share in the merits and joys of the saints, even as they share in our struggles and our longing for peace and reconciliation. Their joy in the victory of the Risen Christ gives us strength as we strive to overcome our indifference and hardness of heart.  

[from the Vatican Web site]

Read Pope Francis's message for Lent 2015 in full.  And read the letter the Pope cited from St. Therese (her last letter to her spiritual brother, Father Adolphe Roulland) at the Web site of the Archives of the Carmel of Lisieux.