Talking excitedly

is often mistaken for the 'energy to execute'.

I've seen this in myself. There have been numerous occasions when I've talked so excitedly about something and on the next update I had nothing to show for all the talk.

Energy to talk excitedly is momentary. Excitement during execution and steadfastness in execution span far greater time and require a different nature of energy, a different reserve of energy.

I'm afraid there aren't too many indicators to feel the latter.