Not excessive or modest in all actions is an attitude that is highly recommended by Islam. With this attitude excessive action (over acting), fabrication, or engineering can be avoided. With this attitude someone does what they are in accordance with their respective capacities, not by forcing themselves.
For example in terms of eating and drinking, Allah SWT said, "Eat and drink you and do not overdo it." (Surat al-A'raf: 31).
Our stomach has a measure to load enough food to keep our body upright, so we can worship Him. The excess amount of food loaded by the body does not have a better effect on our body, but can actually cause disease.
Also we are commanded to be simple, not arrogant in saying and acting. Allah SWT said, "And do not turn your face away from men (because they are arrogant) and do not walk proudly on the earth. Indeed, Allah does not like those who are proud and pride themselves. And it is simple for you to walk and soften your voice. "(Surat Luqman: 18-19).
In spending any property, we are commanded not to be wasteful (Surat al-Isra ': 26 and QS. Al-An'nam: 141). But don't be stingy too (Surah An-Nisaa: 36-37 and QS. Muhammad: 37). Even in mahdlah (ritual) worship we are forbidden by the Prophet Muhammad to overdo it.
It is said, there were three friends who went to the house of the Prophet Muhammad to find out how he worshiped. The three people received an explanation from his wife how the Prophet's worship was good, both his prayer, his fast, his zakat, and so on.
After hearing the story of the good worship of the Prophet Muhammad, the three people felt that what he had done was nothing compared to the Messenger of Allah. Because the Messenger of Allah who has just been cared for is his worship.
They then determined: one would pray all night, the other would fast constantly, while the third would not marry so that they would not be busy in family matters. So that you can devote all your energy, mind, and time to worship.
When he heard the decrees of the three friends, the Prophet Muhammad called them and gave an explanation, that he prayed but also slept. He fasted, but also broke (not constantly). He also married, even those who were not married were said not to be his followers.
From the story can be drawn lessons that we should not overdo it in doing, including in worshiping God. Excession means overreaching, while Allah does not like people who are overreach (QS. Al-An'aam: 141). (*)