Your body has numerous external and internal blessings
Hands, Legs, Eyes, Ears, tongue, intellect, Etc
And Eyes are the Special gift;
sever punishment is fixed for not to be grateful for these things!
And not only the EYES there are things to be grateful;
The GRATEFUL is done when we apply them as per religious rules;
And this GRATEFULNESS is an IBADAT/prayer;
And ibadat is a kind of gratefulness;
Allah has doused the Whole SKY and the LAND for human use;
These blessings and mysteries softens our hearts
Why are we UNGRATEFUL?
So the LOVING slaves of ALLAH says:
"OH Allah these things are not meaningless, So don't burn us with the Hell fire"