Verily, Allah enjoins justice, and the doing of good to others; and giving
like kindred; and forbids indecency, and manifest evil, and wrongful
transgression. (The Holy Quran, an-Nahl 16:91)

This verse sets forth three gradations of doing good.
The first is the doing of good in return for good.
This is the lowest gradation and even an average person
can easily acquire this gradation that he should do good
to those who do good to him.
The second gradation is a little more difficult than
the first, and that is to take the initiative in doing
good out of pure benevolence. This is the middle
grade. Most people act benevolently towards the
poor, but there is a hidden deficiency in benevolence,
that the person exercising benevolence is conscious
of it and desires gratitude or prayer in return for his
benevolence. If on any occasion the other person
should turn against him, he considers him ungrateful.
On occasion he reminds him of his benevolence or
puts some heavy burden upon him.

The third grade of doing good is graciousness as
between kindred. God Almighty directs that in this
grade there should be no idea of benevolence or any
desire for gratitude, but good should be done out of
such eager sympathy as, for instance, a mother does
good to her child. This is the highest grade of doing
good which cannot be exceeded. But God Almighty
has conditioned all these grades of doing good with
their appropriate time and place. The verse cited
above clearly indicates that if these virtues are not
exercised in their proper places they would become
vices.