" However, it must also be pointed out that this word ago is also the root for the Greek word agon, which is where we get the word agony. Even in Greek, the word agon describes an intense conflict, such as a struggle in a wrestling match or a struggle of the human will. This illustrates the fact that although the Holy Spirit wants to lead us, our human will doesn’t like the idea of being led. You see, it’s the nature of the flesh to want to go its own way, so when we choose to walk in the Spirit and let Him dictate our lives, His leadership over us creates a struggle between our will and our flesh. "

― Rick Renner , Sparkling Gems from the Greek: 365 Greek Word Studies for Every Day of the Year to Sharpen Your Understanding of God's Word