Virginia Woolf
A Room of One's Own
“I have one big idea and limited savings. Play it safe or bet on it?”
The question, as you have put it, has the shape of a gig lamp, one bright choice and then the next, and life is not like that; it is a halo, and your idea is already inside it, coloring everything you look at, or you would not have asked. So let us begin with the arithmetic, because I always do.
How much a year does the room cost, the literal room, with the door that locks, in which the idea can be worked on without a relation calling up the stairs? Secure that first; it is not cowardice, it is the condition. Then give the idea one honest year, every morning, without the flash of anger at those who doubt it, since anger spoils the prose.
If at the end it is a moment of being and not cotton wool, you will know, and the savings will seem a small thing to have spent.
Sample response from this soul, not a quotation or endorsement.