Walk is blameless.

Psalm 84:1-12
Blessed are 1)those who dwell in your house; 2) those whose strength is in you, who have set their hearts on pilgrimage. 3)the man who thrust in you.
For the Lord is a sun and shield; the Lord bestows favor and honor; no good thing does he withhold from those walk is blameless.
Praise be to the Lord, How lovely is your dwelling place, better is one day in your courts than a thousand elsewhere.
The pilgrim comes to Jerusalem for one of the great annual festivals His heart sings for joy at the prospect of worshipping God in his place.
Why?
Valley of Baca: Possible an actually the pilgrim passes on his way to Jerusalem. But the "thirsty valley" gives the sense.
We don't have like pilgrim went to Jerusalem in this generation, but set out heart on pilgrimage as walk forward to the way of getting award from the heaven.
Blessed man is who dwell in the place of righteous, whose strength is in the Lord and who set his heart in God and has faith in the Lord. Because the Lord does not withhold good thing to those who walk is blameless.
Walk in blameless need more strength from the Lord, he has to bear his cross the follow Christ.
How?
What is our heart thinking and what we are doing make our dwell place belong to the Lord's or to the devil's.
O Lord, bestow favor and honor, strengthen and remind me in your spirit to walk in blameless way.