29. When people say that it is impossible to attain perfection, to be once and for all free from the passions, or to participate fully in the Holy Spirit, we should cite Holy Scripture against them, showing them that they are ignorant and speak falsely and dangerously. For the Lord said: 'Become perfect, as your heavenly Father is perfect' (Matt. 5:48), perfection denoting total purity; and: 'I desire these men to be with Me wherever I am, so that they may see My glory' (John 17:24).