Is happiness an inside job? Or does it depend on external factors?
One approach to these questions is to think in terms of degree of facilitation. Some events are like a weight, making harder for us to fly; some are like a lift, facilitating our happiness. But, at the end of day, considering even the way we discern between weights and lifts (same event can be considered in various ways, and especially with different degrees of effect, by different people), we can say that happiness is an attitude, not a place to reach through external factors.
This is one of the pillars of the “happiness formula” we are working on, with related mathematical model, which will be shared in a free eBook.