The souls in Purgatory are faithful people, some of whom are still marred by attitudes unworthy of Heaven - hence the need for the purification wrought in each person by the Holy Spirit. No-one can enter Heaven unless full of gratitude, joy and humility. No-one can go in, still thinking, about his health in earthly life, or other matters: "Why should I be treated like this? I deserve better".
The Church teaches the truth, in every age of our history, yet each of the mystics experiences it - for example, St Paul, St Teresa of Avila, St Thomas Aquinas. It is the Christian mystic who prays with trust, reverence and humility, who knows God better than anyone, through union with Christ in prayer. The mystics have produced the most lyrical and intellectually-coherent accounts of what they have learned of God - which knowledge echoes and confirms the truths taught by the Church, and illumines them.
Whether we are single or married, called to the lay state, or single and called to Priesthood or the Religious Life, we are invited by God to have firm faith in His power to help us. It's as if He has arms full of gifts such as courage, hope, greater faith, and love and humility. If we ask for them, He will lavish them upon us, so that we can be good and obedient like Christ.
A person who bears pains and humiliations in patience, out of love for Christ, is like Him Who was wounded for our sake; and in her union with Christ in love, she and He can make one prayer and one Sacrifice to offer to the Father, in homage, in reparation for sin, and in intercession for sinners today.
When a 'child of God' offers in conversation not words of charity or compassion, but malicious gossip or salacious comments, that soul is like a holy shrine from which now emerges no spring, no living water of grace, but from which oozes drops of evil-smelling puss. Such a serious infection needs powerful help.
Christ told me how little the Cross is mentioned by preachers and teachers today: the Cross on which He suffered because of the grievous sins no longer mentioned. He is grieving, too, because people say that devotion to His Mother is old fashioned, and because Catholic school children are often taught more about self-esteem than humility.