Psalms 143:10 (KJV)
10 Teach me to do thy will; for thou art my God: thy spirit is good; lead me
into the land of uprightness.

The words for land of uprightness are literally "an even land". David was
looking for a place to do God's will where he could spiritually walk on flat

In the new testament Paul told us to go through life as though we were running
a race. He said we were to run a good race always looking ahead to the prize
that was before us. If you have ever run in a race or watched one you probably
know the ground does not stay flat. In the San Francisco Marathon imagine all
the hills rolling up and down the course as the marathon winds through the
city. Runners struggle with each breath going up hills and they ease back as
they run down the hills. As they approach flat ground they can stretch out full
and run. David was looking for that flat ground where spiritually he could wind
out in full stretch living for God. David didn't want to struggle with the sins
going uphill and he didn't want to ignore God by living too freely and easily.
David wanted to be on flat ground, in the land of uprightness, living for God,
doing His will. Pray that God would place you in the land of uprightness doing
His will and living according to His word. Pray that as you race for the prize
you will keep your eyes focused on Jesus. May God bless you and care for you