Micah 6:6-8 With what shall I come before the LORD, And bow myself before the High God? Shall I come before Him with burnt offerings, With calves a year old? 7 Will the LORD be pleased with thousands of rams, Ten thousand rivers of oil? Shall I give my firstborn for my transgression, The fruit of my body for the sin of my soul? 8 He has shown you, O man, what is good; And what does the LORD require of you But to do justly, To love mercy, And to walk humbly with your God?
Micah is telling the Israelites that the prescibed works of the law were not the way to please God. The law was in place to teach them about justice, mercy, and humility. Jesus quotes Micah but gives an interesting twist on the verse:
Mat 23:23 Woe to you, scribes and Pharisees, hypocrites! For you pay tithe of mint and anise and cummin, and have neglected the weightier matters of the law: justice and mercy and faith. These you ought to have done, without leaving the others undone.
Notice that Jesus replaces Micah's phrase "walk humbly with thy God" with "faith". In doing so, he gave us a marvelous definition of what faith is. Faith is "to walk humbly with thy God".
I hope you have found this helpful.