Be childlike, not childish.
Whenever I talk to my younger sister on how my day went, she'll tell me how she doesn't understand anything I'm saying because it's all 'adult talk'. Yes, I am a young adult but most of the time, I just feel like a kid forced to take on adult responsibilities. No one told me that after finishing university, you'd be pushed straight into the deep end! So to those who are currently studying right now, try to enjoy your studies no matter how stressful it is. Adult life can be boring and colourless, which is why whenever I get the chance to be a kid, I'll jump right on it. A wise man once told me to always retain the good spirits of a child. So throughout your adulthood, remember to remain childlike, not childish.