As a rule, with me an unfinished [idea] is a thing that might as well be rubbed out. It's better, if there's something good in it that I might make use of elsewhere, to leave it at the back of my mind than on paper in a drawer. If I leave it in a drawer it remains the same thing but if it's in the memory it becomes transformed into something else.
I start with a comprehensive list of all the recent songs that have been big hits - and then I go down that list and see if I can come up with funny ideas for them. I can always come up with ideas, but not necessarily good ones!
The difference between architecture and building is that the former expresses an idea, while the latter is merely a structure built on economical principles. The value of matter depends solely on its capacities of expressing ideas.
The relativity principle in connection with the basic Maxwellian equations demands that the mass should be a direct measure of the energy contained in a body; light transfers mass. With radium there should be a noticeable diminution of mass. The idea is amusing and enticing; but whether the Almighty is laughing at it and is leading me up the garden path -- that I cannot know.
So shall we come to look at the world with new eyes. It shall answer the endless inquiry of the intellect, — What is truth? and of the affections, — What is good? by yielding itself passive to the educated Will. ... Build, therefore, your own world. As fast as you conform your life to the pure idea in your mind, that will unfold its great proportions. A correspondent revolution in things will attend the influx of the spirit.
In this day of wonders no one will say that a thing or an idea is worthless because it is new. To say it is impossible because it is difficult is again not in consonance with the spirit of the age. Things undreamt of are daily being seen, the impossible is ever becoming possible.
For all I know we may be visited by a different extraterrestrial civilization every second Tuesday, but there's no support for this appealing idea. The extraordinary claims are not supported by extraordinary evidence.