Psalms 78:7

That they might set their hope in God -That they might place confidence in God; that they might maintain their allegiance to him. The object was to give such exhibitions of his character and government as to inspire just confidence in him, or to lead people to trust in him; and not to trust in idols and false gods. All the laws which God has ordained are such as are suited to inspire confidence in him as a just and righteous ruler; and all his dealings with mankind, when they are properly - that is, “really” - understood, will be found to be adapted to the same end. And not forget the works of God -His doings.