If you can’t explain why you want it, you’ll quit when it gets expensive.

Reasons get tested when the price goes up. Early on, wanting something vaguely is enough, because the cost is low and the novelty carries you. The moment it turns expensive in time or money or pride, you need a real reason to set against that cost, and if all you have is that it sounds good, you walk away. A clear reason is not motivation, it is load-bearing.

Write yours in one plain sentence, leaving out the words that sound impressive. Read it on the days the thing is going badly. If you cannot write the sentence at all, better to find that out cheaply.