toleration from the intolerant,
and kindness from the unkind;
I am ungrateful to these teachers.
- Khalil Gibran
Gratefulness is a great virtue. A sense of gratefulness towards everyone around us, from whom we derive benefits knowingly or unknowingly ... ultimately make us grateful to Almighty God. It is towards God the gratefulness comes to fullcircle; because He showers us with infinite mercy every moment.
If we just think about our body, each moment there are so many tiny little things that if goes wrong slightly, can bring disaster. Yet on many of those mechanisms we have no control. For example even the muscles of our eyes are controlled by the brain impulse and those nerves if dysfunction, may make us blind or paralysed.