A beautiful statement of Sh. Uthaymeen regarding the perfection of Islaam
The Noble Shaykh Muhammad bin Saalih al-‘Uthaymeen (rahimahullah) said:
“The Religion of Islaam is a Creed and a Legislation and it is perfect in both.

Islaam commands with:
1- The absolute single worship of Allaah the Most High (Alone) and forbids polytheism 

(the worship of anything other than Allâh).
2- Truthfulness and forbids lying.
3- Justice and forbids oppression.
4- Trustworthiness and forbids treachery.
5- Faithfullness and forbids betrayal.
6- Being good to ones parents and forbids being disrespectful (to them).
7- Keeping the ties of kinship with ones relatives and forbids cutting them off.
8- Having good manners/relations with ones neighbourhood and forbids (any kind of) ill-treatment (towards ones neighbours).
Generally speaking, Islaam commands with every kind of noble mannerism and forbids against all evil/despicable behaviour.
(Islaam also) commands with every righteous action and prohibits all forms of wrong/evil.
Allaah the Most High said (the meaning of):

((Indeed Allaah enjoins al-‘Adl (justice and worshipping none but Allaah) and al-Ihsaan 

(to be patient in performing one’s duties to Allaah, for His Sake Alone) and in giving help to kith and kin 

and forbids al-Fahshaa’ (all evil deeds) and al-Munkar (polytheism, disbelief) and al-Baghy (oppression).

(Allaah) admonishes you so that you may take heed))

[Sooratun-Nahl: Aayah 90]”
• Translated by Abul-Husayn Yusuf McNulty al-Irlandee, from Sharh Usoolil-Eemaan of Shaykh ibnul-‘Uthaymeen, Daarul-Watn pg.9