He went away again the second time, and prayed, saying, O my Father, if this cup may not pass away from me, except I drink it, thy will be done.
I can of mine own self do nothing: as I hear, I judge: and my judgment is just; because I seek not mine own will, but the will of the Father which hath sent me.
In the beginning, Genesis 2:16, God gave man a command and specific instructions, leaving man with the ultimate decision to obey or disobey. Man's will at that time had not yet been corrupted by sin's cruel bite.
Your will is a member of your soul. Your will along with the other members of your soul were greatly influenced and corrupted by sin before you were born again. Our will was trained and greatly influenced by the kingdom of darkness to oppose God's will, (Ephesians 2). For this reason, our soul's must now be re-trained or transformed, after the new birth, to submit and agree with the will of God, (Romans 12:1-2).
This is not something that happens automatically, we must choose to allow God to change our mind-set.
And if it seem evil unto you to serve the LORD, choose you this day whom ye will serve; whether the gods which your fathers served that [were] on the other side of the flood, or the gods of the Amorites, in whose land ye dwell: but as for me and my house, we will serve the LORD.
Joshua refused to follow the crowd. He chose to serve God even though everyone else was wanting to follow after the old way of doing things. Notice, God did not make Joshua choose His way, God made it available but not by force or contraint. We must choose to allow the word of God to Detoxify our soul; mind, will and emotions, so that we can be a people yielded and well pleasing to God.
For more on The Human Will read Cathy's new books, Liberation for Total Transformation.