Cheerfulness, it would appear, is a matter which depends fully as much on the state of things within, as on the state of things without and around us. ↗
The process depends on the situation, and I don't think there are any two songs that have gone exactly the same way... well, actually, that's not true. ↗
The way you remember the past depends upon your hope for the future. And if what you see in your future has no hope, it has no potential, then you view the past that brought you to here as not very good. ↗
From all this it follows what the general character of the problem of the development of a body of scientific knowledge is, in so far as it depends on elements internal to science itself. ↗
What one decides to do in crisis depends on one's philosophy of life, and that philosophy cannot be changed by an incident. If one hasn't any philosophy in crises, others make the decision. ↗