The problems that we experience in life haven't changed. They might be different in technologies but they are the same in nature. As humans, we experience the same emotions that people of old had experienced themselves. Although they are no longer here, that's not to say they didn't feel as we do now. And future generations will wonder the same when we are all gone. So take heart and be the person you want to be. It's really a choice. As long as you are here, you might as well aim for the best because much of who you want to be -- kind, hardworking, helpful -- can be accomplished immediately. You just need to keep it up.
Keeping promises is hard. It requires us to do things we don't want to do. But keep those promises you must do. Otherwise, do not make them in the first place. But since you have made them, you must keep them, especially if it would benefit all those involved including yourself.