I don't think necessity is the mother of invention. Invention, in my opinion, arises directly from idleness, possibly also from laziness - to save oneself trouble.
For the young people here: practicality is a good thing. There are times where compromise is necessary. That's part of wisdom. But it's also important to hang on to what you believe.
And since you know you cannot see yourself, so well as by reflection, I, your glass, will modestly discover to yourself, that of yourself which you yet know not of.
I pray you bear me henceforth from the noise and rumour of the field, where I may think the remnant of my thoughts in peace, and part of this body and my soul with contemplation and devout desires.
The scientific theorist is not to be envied. For Nature, or more precisely experiment, is an exorable and not very friendly judge of his work. It never says "yes" to a theory. In the most favorable cases it says "Maybe," and in the great majority of cases simply "No." If an experiment agrees with a theory it means for the latter "Maybe," and if it does not agree it means "No." Probably every theory will some day experience its "No" - most theories, soon after conception.