Shabbat Chol Hamoed Succot Hallel Paragraph Six
“What can I respond to God
for all the good He has given to make me independent?”
Rav Shlomo Kluger (Derushim L’Pesach #2) posits that the degree of gratitude should reflect the giver’s intentions. If someone is kind to another only to benefit himself, the recipient is, of course, obligated to be grateful, but to a lesser degree than he would be to someone who helped him solely from concern for the person in need. King David used this verse to say, “Kol tagmulohi ‘Aly,’” all God does is for me, and therefore I owe the highest the level of gratitude.
Shabbat is a gift that is entirely for us, and therefore, we owe the same gratitude expressed by King David. On Succot we recall all the kindnesses God did for us while we were in the desert; the Clouds of Protection, the Manna, water from a rock etc. It was all for us.