Sanctification is the best of all things, for it cleanses the soul, and illuminates the conscience, and kindles the heart, and wakens the spirit, and girds up the loins, and glorifies virtue and separates us from creatures, and unites us with God. The quickest means to bring us to perfection is suffering; none enjoy everlasting blessedness more than those who share with Christ the bitterest pangs. Nothing is sharper than suffering, nothing is sweeter than to have suffered. The surest foundation in which this perfection may rest is humility; whatever here crawls in the deepest abjectness, that the Spirit lifts to the very heights of God, for love brings suffering and suffering brings love.
Sermon VI : Sanctification - Meister Eckhart's Sermons (1909)