“And now, Israel, what does the Lord your God ask of you except to fear the Lord your God by walking in all His ways, to love Him, and to worship the Lord your God with all your heart and all your soul? Deut 10:12 (HCSB)
When we fear God it means that we stand in awe and reverence of Him. Biblically there is a sense of fear as in being afraid, when we realize whose presence we are in. But the word also refers to awe and reverence. So what does the fear of God look like? Moses describes it in Deut. 10.12.
It means we walk in all of his ways. In other words we obey Him as He has directed in His Word. If we are not obeying then we are not walking in His ways. Be careful that we don't deceive ourselves. God is not impressed with 70 or 80 or even 90% obedience. He wants all.
To fear Him also means that we love Him. The word actually denotes a covenant relationship. God has chosen to love us and to express His love to us in so many ways. What awe we should have when we realize almighty God loves us. We should love Him back.
We also worship Him because we fear Him. A correct view of ourselves and Him will cause us to worship Him. When Isaiah (Isa. 6) saw and understood who God was, he could not help but to worship Him. We will do the same.
Obey, love and worship should be every Christ followers response to an awesome God.