Middle Course (Wasatiyyah)

Reported by Abu Hurairah (RA): The Prophet (peace be upon him) said, "The religion (of Islam) is easy, and whoever makes the religion a rigour, it will overpower him. So, follow a middle course (in worship); if you can't do this, do something near to it and give glad tidings and seek help (of Allah) at morning and at dusk and some part of night".
[Al-Bukhari]