If you can't understand why someone is doing something, look at the consequences of their actions, whatever they might be, and then infer the motivations from their consequences.
Success in business comes from understanding both the numbers and the people behind them.
Life is too short to be anything but happy.
And I urge you to please notice when you are happy, and exclaim or murmur or think at some point, 'If this isn't nice, I don't know what is.'