It is not that difficult to know if a person needs food and clothing.
Those are considered as essential items even in developed countries and affluent societies.
So to see a person in need of food and clothing and yet doing nothing about it is considered uncharitable.
And the 1st reading would tell us that words of comfort that are not accompanied with acts of charity are just hollow empty sounds.
Faith and good works are like the two hands of belief and action.
The need for food and clothing are tangible items that are quite obvious in those who are in need.
But there are also intangible needs like love, compassion, forgiveness, companionship, etc that are not so obvious intially.
But with faith, God will reveal to us what we and others need beside food and clothing.
With faith, may we serve others in their need and God will bless us in our need