Despair of what is in the others` hands
Sa`d ibn Abi waqqas, may Allah e pleased with him, narrated that a man said: O Messenger of Allah advice me and let the advice be brief. The Messenger of Allah, may the peace and blessings of Allah be upon him replied: despair of what is in the others` hands since this is real self sufficiency. Avoid covetousness for it is the permanent poorness, offer the prayer as if you will depart from this world after it and avoid what causes you to excuse.
The Messenger of Allah, may the peace and blessings of Allah be upon him, used to utter the word, that affects the hearts and minds of the Muslims and the non Muslims. The generations would accept it a s a piece of wisdom since the Messenger of Allah, may the peace and blessings of Allah be upon him, had been granted the most comprehensive words. Allah caused him to utter nothing but the truth. He is sent to the Humanity in general to guide them to the straight path both in sayings or deeds.
His Hadiths is complete way of life, a constitution for the Muslim nation, and a code of honor, to which people refer in all of their religious and their worldly affairs. they find no embarrassment or hardship in applying his rulings, but they can only acknowledge it with reassurance and reverence.
His companions, may Allah be pleased with them, used to ask him about all what matters them, and then they found the wise answer to every question in a way that rectifies both the individual and the community as a whole.