As the old adage goes, you are simply the sum of the company that you keep.
Yes, this is a generalisation, yet on many levels it’s quite true. If we spend our lives surrounded by people with ill intent, it’s likely that we ourselves will subconsciously start to justify such actions and even take those morals on board as our own. Similarly, if we’re surrounded by people with ambition, and the drive to achieve great things, we ourselves are more likely to achieve big things.