Born in November 13, 354 AD, in Tagaste, Numidia (modern day Souk Ahras, Algeria), to a devout Christian mother and a Pagan father; he was determined to gain as much power and notoriety as he could, he often caused trouble, he recounts a time he stole from an orchard not because he wanted to eat the fruit but merely because he wanted to rebel. Although, despite his rebelliousness, he was an educated young man, and his father sent him to Carthage to study.
In Carthage he had a bad influence from the locals, who would often get drunk and do other sinful things; in search of the truth he converted to Manichaeism, a Gnostic religion about the struggle between the good god and the evil god and how to decipher the secret knowledge of them, he would sleep around, he even had a child with a woman out of wedlock when he was 18.
He eventually made it to Milan, the center of the world for someone like Augustine who was in constant search for power, notoriety, and wealth; he was appointed the Imperial Professor of rhetoric in Milan. In Milan, he continued his search for truth, he began to research neo-platonic philosophy, philosophy of the academics, and more; but something was always missing, until he began to read the teachings of Saint Ambrose of Milan, he became real friends with Ambrose, and he heard so much truth in the Christian way of thinking, he was still unwilling to give up his pleasures and it was this time in his life when he famously wrote "Lord, give me chastity and continence, but not yet.", he was not yet able to fully embrace Christianity.
He constantly continued his sinful ways until a day when he cried out to God to help him and he heard a child chanting "Take up and read!", there was no reason for the child to be chanting so he took that as a sign, so he took up the Bible and decided to read whatever page it landed on, it just so happened to land on the passage that said "Not in rioting or drunkenness, not in chambering and wantonness, not in strife and envying, but put on the Lord Jesus Christ and make no provision for the flesh to fulfill the lusts thereof" this experience finally convinced him to embrace the teachings of Jesus Christ, this is when he and his son where baptized by Saint Ambrose into the Early Catholic Church.
He soon left with his mother and his son back to the home of his younger self to preach the word of God. There his mother fell ill and she spoke to him "Son, nothing in this world now affords me delight. I do not know what there is now left for me to do or why I am still here, all my hopes in this world now being fulfilled." as she prayed that her son would become Christian, shortly there after his son, Adeodatus died as well. This was rough on Augustine, and he then gave all his wealth to the poor and converted his house into a monastic facility for him and a few like-minded Christians.
He became Bishop of Hippo in 391 AD, and for the next 39 years of his life he lived in modesty and piety; this was the opposite of the first half of his life when he always sought pleasure yet was never happy, but in these years he actually experienced real happiness.
"Our hearts are restless until it rests in You." -Saint Augustine of Hippo
Saint Augustine is honoured and venerated in the Roman Catholic Church, Eastern Orthodox Church, Oriental Orthodox Church, and Assyrian Church of the East. His teachings are very important to the early Protestant Reformers, and his thoughts on double-predestination, along with Saint Thomas Aquinas', were large influences in Calvinist theology and remain so to this day.