From An Exposition of the Orthodox Faith, Book IV, Chapter 11: Concerning the Cross and here further concerning Faith.
The word “Cross” is foolishness to those that perish, but to us who are saved it is the power of God (1 Corinthians 1:23). For he that is spiritual judges all things, but the natural man receives not the things of the Spirit. For it is foolishness to those who do not receive in faith and who do not consider God's goodness and omnipotence, but search out divine things with human and natural reasonings. For all the things that are of God are above nature and reason and conception. For should any one consider how and for what purpose God brought all things out of nothing and into being, and aim at arriving at that by natural reasonings, he fails to comprehend it. For knowledge of this kind belongs to spirits and demons.
Whosoever will come after me, let him deny himself, and take up his cross, and follow me (Mk. 8:34), said the Lord to his disciples, calling them unto Him, as we heard today in the Gospels.
Dear brothers and sisters! We too are disciples of our Lord Jesus Christ, because we are Christians. We too are called unto the Lord, to this holy temple, to hear His teaching. We stand before the face of the Lord. His gaze is directed at us. Our souls are laid bare before Him; our secret thoughts and hidden feelings are open to Him. He sees all of our intentions; He sees the truth, and the sins we have committed from our youth; He sees our whole life, past and future; even what we have not yet done is already written in His book. He knows the hour of our passing into immeasurable eternity, and gives us His all-holy commandment for our salvation: Whosoever will come after me, let him deny himself, and take up his cross, and follow me.
"Following the Holy Fathers" ... It was usual in the Ancient Church to introduce doctrinal statements by phrases like this.
The Decree of Chalcedon opens precisely with these very words. The Seventh Ecumenical Council introduces its decision concerning the Holy Icons in a more elaborate way: "Following the Divinely inspired teaching of the Holy Fathers and the Tradition of the Catholic Church." The didaskalia of the Fathers is the formal and normative term of reference.
Take possession of your stomach, before it takes possession of you. —St. John Climacus
How early should children begin fasting? According to the teaching of the ancient fathers, a healthy child begins to fast once it no longer takes its mother’s milk, that is, at around age three. (In ancient times, Jewish women breastfed their infants until they reached three years of age). Along with the need to observe whatever degree of fasting, parents must also take care to prevent their children from forming a habit of overeating, or eating too often, outside of the times established for taking food—eating between meals. St. Theophan the Recluse gives parents advice in this regard: “A child should eat in such a way that while developing and fortifying the body and giving it health, he does not foment flesh-pleasing in the soul. Regardless of how young your child is, he must begin from the earliest years to stabilize the flesh, which leans toward coarse matter, and accustom it to self control, so that in both the childhood and teenage years and beyond, he can easily and freely control this need.”
The holy, great, and Ecumenical Council, which, by the grace of God and the will of the pious and Christ-loving Emperors, Constantine and Irene, his mother, was gathered together for the second time at Nice, the illustrious metropolis of Bithynia, in the holy church of God which is named Sophia, having followed the tradition of the Catholic Church, hath defined as follows: Christ our Lord, who hath bestowed upon us the light of the knowledge of himself, and hath redeemed us from the darkness of idolatrous madness, having espoused to himself the Holy Catholic Church without spot or defect, promised that he would so preserve her: and gave his word to this effect to his holy disciples when he said Lo! I am with you always, even unto the end of the world which promise he made, not only to them, but to us also who should believe in his name through their word.
I have not kept the vows of my baptism, but have made myself unwanted before the face of God.