"Giving thanks for God's goodness."
Imagine yourself entering the gates at the entrance to the temple alongside a throng of people gathering to praise the Lord. As you near the courts of the temple, you are swept up in the words of this prayer uttered by all those around you: "Enter his gates with thanksgiving…" This prayer functioned as a call to worship for people entering the temple. It helped the people to focus their thoughts on God and his good gifts to them. It set a tone of thankfulness for the worship service that would follow.
Enter his gates with thanksgiving: go into his courts with praise. Give thanks to him and bless his name.
For the Lord is good. His unfailing love continues forever, and his faithfulness continues to each generation.
The unthankful heart... discovers no mercies;
But let the thankful heart sweep through the day
And as the magnet finds the iron,
So it will find, in every hour, some heavenly blessings!
Henry Ward Beecher