What should be a Christian's response in showing gratitude for God's Love?

Answer 1

First I think you have to evaluate how God's love is manifested and upon whom. I assume you feel that you have personally been the recipient of God's love and can measure that by the fact that you and those close to you are financially secure and free of any disease more serious than the occasional cold.

If that is the case, then it is clear that your path lies in personally helping those for whom God's love has, for reasons known only by Himself, manifested itself in homelessness, poverty, dreadful and incurable disease; in fact, anyone who, by your own standards, has been blessed with less of God's love than you have.

Clearly, God is aware of the extent of your love for Him as he is aware of everything else, so if your question means "how many hours a day does God want me to spend shouting Hosannas in His name" the answer is None. God has put you in a position to be able to thank Him by helping those less able to help themselves. Presumably, if you waste this opportunity (perhaps by blaming a person for his circumstances rather than looking at his circumstances as providing you with an opportunity to serve God by way of thanks) then God will not only disapprove of your inaction but might, if He feels so inclined, reward you by letting you walk a few miles in the other man's unfortunate shoes. What Jesus Said"If you love me, you will obey what I command." [John 14:15 ]

*and

God forgave us of our sins, so we forgive others their sins against us.

Answer 2

Obedience.

Obedience to God's will for believers as it is revealed in God's word - The Bible.

For example Jesus said to His disciples "Go and make disciples".