He became poor, so that by his poverty you might become rich (cf. 2 Cor 8:9)

Christ’s poverty which enriches us is his taking flesh and bearing our weaknesses and sins as an expression of God’s infinite mercy to us. Christ’s poverty is the greatest treasure of all: Jesus’ wealth is that of his boundless confidence in God the Father, his constant trust, his desire always and only to do the Father’s will and give glory to him. Jesus is rich in the same way as a child who feels loved and who loves its parents, without doubting their love and tenderness for an instant. Jesus’ wealth lies in his being the Son; his unique relationship with the Father is the sovereign prerogative of this Messiah who is poor.

from Lenten Message of our Holy Father Francis 2014