The requital of gratitude which is due to God ought to be offered to him without command, and without any delay or hesitation, showing the mind to be free from vices; for it becomes that man, who has been endued with blessings by God, to offer him his thanks with a grateful and willing mind; but he who delays to do so, waiting for an express command, is ungrateful, being as it were compelled by necessity honour his benefactor.
Why is he said to have built an altar to God, and not to the Lord? (Genesis 8:20).