If we were able to purchase the kingdom with wealth, with gold, silver, and precious stones, with luxury, knowledge, and power, the kingdom of heaven could not be gained by all, inasmuch as we are not all alike and do not all possess these things. But God has granted that his kingdom may be gained with things all persons may possess at all times and of which we may easily have an abundance. For there is no person who can not be poor for love of Christ, and who cannot work and do penance at least in his heart, and endure contempt. Certainly none can pass through this life with out encountering some of these things, which, when born patiently and cheerfully for Christ's sake, will make us worthy of the kingdom of God.
Source: The Book of Divine Consolation