Sayings of the Holy Fathers:

"If, in the case of one human being who has done wrong to another, God in His grace has commanded that we should be forgiving to the offender seventy times seven, how much more will God forgive the person who offers up supplication for his sins?"

John the Solitary

The Syriac Fathers on Prayer

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"Persevere with patience in your prayer, and repulse the cares and doubts that arise within you."

Evagrios the Solitary

On Prayer, in the Philokalia

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"In everything they the Apostles did, they thought of God and lived in constant devotion to Him. This spiritual state was their unceasing prayer."

St. Basil the Great