Worf in Picard seems true to this quote from the very first Worf-focused episode, “Heart of Glory”: “The true test of a warrior is not without, it is within.”

KORRIS: Wait. I do not believe this. 
WORF: Believe it. 
KORRIS: I have tasted your heart. You have been with them, but you are still of us. Do not deny the challenge of your destiny. Get off your knees and soar. Open your eyes and let the dream take flight. 
WORF: My brother, it is you who does not see. You look for battles in the wrong place. The test of the warrior is not without, it is within. Here, here we meet the challenge. It is the weaknesses in here a warrior must overcome. 
KORRIS: No. 
WORF: You have talked of glory and of conquest and legends we will write. 
KORRIS: Yes, the birthright of every Klingon. 
WORF: Yet in all you say, where are the words duty, honour, loyalty. Without which a warrior is nothing. 
KORRIS: What are you saying? Living among these humans has sucked the Klingon heart out of you. 
WORF: Put down the phaser. 
KORRIS: You are a sham! My words were dust upon the ground. Your blood has no fire. You are weak like them. I don’t care what you look like you are no Klingon. 
WORF: Perhaps not. 

“Heart of Glory” was my favorite of the first season Star Trek: The Next Generation episodes when they initially aired.