Speak only what is true; Act with integrity; Maintain your principles; Build trust between people; Practice truthfulness & honesty at all times.

This hadith emphasizes the importance of truthfulness and honesty in all aspects of life. It is narrated on the authority of Yahya that one should always be truthful and honest in their words, actions, and dealings with others. Being truthful means to speak only what is true, while being honest means to act with integrity and fairness. These values are essential for a successful life as they help build trust between people, which is necessary for any kind of relationship or transaction. Furthermore, these values also help us maintain our own integrity by ensuring that we do not compromise our principles or beliefs for any reason whatsoever. Therefore, it is important to practice truthfulness and honesty at all times so that we can lead a successful life both spiritually and materially.