Every single person is important, as each and everyone carries potential for greatness. Not everyone realizes or wishes to recognize this though, thus voiding their importance, and stripping away value that could have been.
Say to yourself first thing in the morning: today I shall meet people who are meddling, ungrateful, aggressive, treacherous, malicious, unsocial. All this has afflicted them through their ignorance of true good and evil. But I have seen that the nature of good is what is right, and the nature of evil is what is wrong, and I have reflected that the nature of the offender himself is akin to my own – not a kinship of blood or seed, but a sharing in the same mind, the same fragment of divinity. Therefore, I cannot be harmed by any of them, as none will infect me with their wrong. Nor can I be angry with my kinsman or hate him. We were born for cooperation, like feet, like hands, like eyelids, like the rows of upper and lower teeth. So to work in opposition to one another is against nature: and anger or rejection is opposition.
Self-harm, my soul, you are doing self-harm: and you will have no more opportunity for self-respect. Life for each of us is a mere moment, and this life of yours is nearly over, while you still show yourself no honour, but let your own welfare depend on other people’s souls.
– Meditations, Marcus Aurelius