Avoid duplicity, that is, do not let your heart be divided between attachment to God and attachment to earthly things, 'You cannot serve God and mammon' (Mt. 6:24); cling to God alone, put your trust in Him alone; for the Devil, by inciting us to duplicity, seeks himself to gain possession of our heart, which is single and indivisible.
John of KronstadtThe accursed one does not allow the eye of the heart to see the Lord or His saints. He darkens our heart in every way. He scatters faith, oppressing, burning and darkening us inwardly. We must look upon all such actions as illusions and falsehood, and break through this imaginary wall to the Lord, or to His Holy Mother, or His saints. As soon as you break through this wall you will be immediately saved. 'Your faith has made you whole' (Mt. 9:22).
John of Kronstadt'With God all things are possible' (Mk. 10:27). With God the thought itself is deed. He speaks and it is. Short and clear. And all the worlds stand by the Word of God.
John of Kronstadt...if you wish to get pure air into your room, or if you go for a walk in the fresh air, think of the pure and of the unclean heart. Many of us like to have pure air in the room (and this is an excellent habit), or are fond of walking in the fresh air, but they do not even think of the necessity of the purity of the spirit or heart (of, so to say, spiritual air, the breath of life); and, living in the fresh air, they allow themselves to indulge in impure thoughts, impure movements of the heart, and even impurity of language, and most impure carnal actions.
John of KronstadtYour Lord is Love: love Him and in Him all men, as His children in Christ. Your Lord is a fire: do not let your heart be cold, but burn with faith and love. Your Lord is light: do not walk in darkness of mind, without reasoning or understanding, or without faith. Your Lord is a God of mercy and bountifulness: be a source of mercy and bountifulness to your neighbors. If you will be such, you will find salvation yourself with everlasting glory.
John of Kronstadt