Abdullah was the son of Abbas, an uncle of the noble Prophet. He was born just three years before the Hijrah. When the Prophet died, Abdullah was thus only thirteen years old.
Abdullah was attentive and alert to whatever the Prophet did and said. His heart was enthusiastic and his young mind was pure and uncluttered, committing the Prophet's words to memory with the capacity and accuracy of a recording instrument. In this way and through his constant researches later, as we shall see, Abdullah became one of the most learned companions of the Prophet, preserving on behalf of later generations of Muslims, the priceless words of the Messenger of God. It is said that he committed to memory about one thousand, six hundred and sixty sayings of the Prophet which are recorded in the collections of al-Bukhari and Muslim.
The Prophet prayed for him: "O Lord, make him acquire a deep understanding of the religion of Islam and instruct him in the meaning and interpretation of things."
The Prophet moreover prayed that he be granted not just knowledge and understanding but wisdom.
During the lifetime of the Prophet, Abdullah would not miss any of his assemblies and he would commit to memory whatever he said. After the Prophet passed away, he would take care to go to as many companions as possible especially those who knew the Prophet longer and learn from them what the Prophet had taught them. Whenever he heard that someone knew a hadith of the Prophet which he did not know he would go quickly to him and record it. He would subject whatever he heard to close scrutiny and check it against other reports. He would go to as many as thirty companions to verify a single matter.
It was not only in the collection of hadith that Abdullah specialized. He devoted himself to acquiring knowledge in a wide variety of fields.
Abdullah ibn Abbas was not content to accumulate knowledge. He felt he had a duty to the ummah to educate those in search of knowledge and the general masses of the Muslim community. He turned to teaching and his house became a university.
To avoid congestion with many groups of people coming to discuss various subjects on a single day, Abdullah decided to devote one day exclusively for a particular subject. On one day, only the exegesis of the Qur'an would be taught while on another day only fiqh (jurisprudence). The maghazi or campaigns of the Prophet, poetry, Arab history before Islam were each allocated a special day.
Abdullah ibn Abbas brought to his teaching a powerful memory and a formidable intellect. His explanations were precise, clear and logical. His arguments were persuasive and supported by pertinent textual evidence and historical facts.
He had a genuine and abiding concern for people. He was thoughtful and caring. He once said: "When I realize the importance of a verse of God's Book, I would wish that all people should know what I know.
"When I hear of a Muslim ruler who deals equitably and rules justly, I am happy on his account and I pray for him...
Abdullah ibn Abbas was constant in his devotions. He kept voluntary fasts regularly and often stayed up at night in Prayer. He would weep while praying and reading the Qur'an.
He passed away at the age of seventy one in the mountainous city of Taif.
Taken from: http://www11.brinkster.com