"Prayer is not made perfect by uttering syllables, O Brethren, but in the purpose of the soul, and in the just actions of a lifetime. Nor are we to believe that God has need of being reminded through our words. We are not to think that we complete our prayer by murmuring a number of syllables, but rather, O Brethren, by the purpose of our soul, and in deeds of virtue extending into every action and moment of our life. Neither are we to think that God needs the reminder of our spoken words; rather are we to believe that He knows our need whether we ask of Him or not. The ear of God has no need of our cry, since He can see even from the movements of our soul what it is that we seek for."
St. Basil the Great, On Prayer