Purgatory is sweet, when suffering for God's sake.

February 2

 The picture of life, if it is made ​​up of representatives of the sins committed, it is wrong and, therefore, comes from the devil. You are loved by Jesus, and [and gives thanks to Jesus because] thy sins already forgiven, and therefore can no longer be room for the folding of the spirit. Wanting to persuade you otherwise is a waste of time, an offense that is the Heart of our most tender lover. If, however, the picture of life is the representation of what could or could you be, then it comes from God.
A desire to be at peace of the cloister is holy, but you must temper it. It is best to do the will of God, waiting a bit longer outside the holy place not to miss to charity than to enjoy the cool shade of the sacred cloister. Suffering and death was the saying of St. Teresa and St. Francis de Sales: "Living to suffer forever." Purgatory is sweet, when suffering for God's sake.
(August 26, 1916, Mary Gargani - Letters. II, p. 236)