On a certain day, while sage Luqman (a) was addressing a big gathering of people sharing his wisdom with them, there came a person and asked him point blank: 'Are you not the same person who used to graze goats with me in such and such forest?' Luqman (a) said: 'Yes, I am the same person." The man asked, 'How then, could you achieve this status that such multitudes of people hold you in reverence and come to hear your words from far and wide?' Luqman (a) said: 'The reason lies in two things I do:

(1) Always telling the truth and

(2) Avoiding the useless things. It appears in another report that he said: 'I tell you about a few things that have given me this station in life. If you were to take to these, you too will have the same rank and status. These are as follow:
(1) Lower your gaze and hold your tongue.
(2) Stay content with lawful sustenance.
(3) Guard your private parts.
(4) Tell the truth and uphold it.
(5) Fulfill the pledge.
(6) Honor the guest.
(7) Protect the neighbor.
(8) Observe silence against wasteful speech and leave off all useless indulgences.' (Ibn kathir ).

Taken from: Ma'ariful-Qur'an1, Volume 7, page: 40

_______________________
1 : Ma'ariful-Qur'an is the name of the famous and trusted detailed commentary (Tafseer) of the Holy Qur'an written by Maulana Mufti Muhammad Shafi' . He was one of the eminent scholars who served as a professor and as a grand Mufti of Darul-Uloom Deoband, the world well-known, trusted and influential university of the Islamic Sciences in the sub-continent of India. This great Islamic masterpiece was translated in to English by two Professors in order to be received by a large number of people for benefiting the wisdom of the holy Quran. Since this Tafseer includes countless different beneficial information (verse, Hadiths, history, science, law, etiquettes, Islamic stories, and etc).