AS A CHRISTIAN WHAT IS YOUR OBLIGATION TO GOD

Mal 3:14-16
14 You have said, It is useless to serve God, and what profit is it if we keep His ordinances and walk gloomily and as if in mourning apparel before the Lord of hosts?
15 And now we consider the proud and arrogant to be happy and favored; evildoers are exalted and prosper; yes, and when they test God, they escape [unpunished].
16 Then those who feared the Lord talked often one to another; and the Lord listened and heard it, and a book of remembrance was written before Him of those who reverenced and worshipfully feared the Lord and who thought on His name.
AMP