To put it simply, one should not be obsessed with power, wealth or fame. Instead, one should always be humble and kind towards others. That's the meaning of greatness. Now, I'm already an adult. I've understood the meaning of those abstract words that stumped me then.
Truth is something that is free of lies or fabrication.
Truth encompasses all authentic facts of any matter. Humans should seek it and spread it to ensure prosperity for the whole world. I don't know why, after hearing Sis Salma's explanation, I got the urge to be a truth seeker. This is what I've been trying to practise all these while. When I was 18, I began to question many things.