As a youth, Rasulullah kept himself aloof from all pleasures and entertainment which the youth of his age would enjoy and laugh at. The greatness of his character had no equal in Makkah. He was very shy.
His noble character was respected by all in Makkah and he had no enemies of all. Once, a war (Harb-ul-Fujjar) broke out between the tribes of Quraish and Banu Qays. Rasulullah was with his uncle Abu Taalib who was the chief of the Banu Hashim tribe, i.e. of the Quraish. Rasulullah 's duty was to pick up the arrows shot by the enemies and give it to the Quraish fighters, but he himself was not directly involved in the fighting.
Rasulullah took great interest in trade at a very early age and he was encouraged by Abu Taalib who took him along on trading missions to the surrounding countries.
Rasulullah refrained from any sinful acts. He developed a sense of helpfulness and sympathy. He helped to revive an institution which was called Half-ul-Fudul (Pledge of Virtues), where members pledged them self to: (1) to keep peace among various tribes (2) to protect travellers from attacks on their journeys (3) to help the poor and needy (4) to protect the weak from their oppressors.
Once, Abdul-ibn-Abi-Al Hamsar had business transaction with Rasulullah and they met in the street. The trader asked Rasulullah to wait there for him and he would return shortly to continue the business. Rasulullah waited there for three days for the man to return, but when the man did so, he realised that Rasulullah kept his promise and had waited patiently for him.
Not only in Makkah, but throughout Arabia, Rasulullah 's name became a house-hold word. His piety, good manners, honesty and trustworthiness made him so famous that he was given the titles of 'As-Saadiq' (The Truthful) and 'Al-Ameen' (The Trustworthy). His honesty led the people of Makkah to leave their goods and valuables in trust with him.
Contents of the biography of the Prophet Muhammed