“For the LORD is good; his mercy is everlasting; and his truth endureth to all generations” (Psalm 100:5).

Those look like three very good reasons to me.

The Lord’s goodness is an essential part of His character. I can count on Him to be good no matter what. What He does results from His goodness. Always.

I’m thankful for that.

The Lord’s mercy does not wear out. Mercy always flows from Him. It outlasts my need for mercy. Always.

I’m thankful for that.

The Lord’s truth lasts. It endures. It remains current. Despite the passage of time. Despite new discoveries. Despite changing circumstances. I can anchor my life on it. Always.

I’m thankful for that.

So. Bless. His. Name!

Surely you could add something...