Excess will tire?

Phrases like "Everything in excess do damage" or "Even beauty tires" are obstacles to get your dreams, because those unconsciously prompts you to stop doing anything that looks like an excess, or tiring.

Of course it tires, so you need to rest as much as you need, then you should continue until you get tired again, then you rest... Life is that way: it seems we stumble with similar situations again and again.