One of my favorite quotes is this "A person who is nice to you but rude to the waiter is not a nice person."
I strongly believe in that.
After a little working experience here and there, I have noticed and even myself, learnt that, we lose our sense of humility (if you even got some) when we make rash decisions and rushing for something. Probably because we weren't thinking.
However, I have often noticed that it is more beneficial that we take our time to decide properly and waste some time than to be fast and thoughtless. Often, it will backfire if you do not take time and think.