In a hadith related by Tardmizi, the Prophet (pbuh) said:
"Whoever spends the night safely in his place of sleep, while he is physically healthy and has sufficient sustenance for his day, it is as if he achieved the world in its entirety."

The meaning of this is that if one has enough food and a safe place to sleep, then he has achieved the best of the good things in this world. And many are those who are at this level in this life but are thankless nonetheless. Allah, the Almighty, said to his messenger (bpuh):
'...i have completed my favor upon you... ' (5:3) .

Look at the life of our prophet. Arent we thankful enough with everything we hv in life?