thirsty

"...he who believes in me will never be thirsty." John 6:35
"Blessed are those who...thirst for righteousness, for they will be filled." Matt 5:6

If I'm still thirsty, what am I not believing? I remember hearing a song with lines:
how can there be any hunger in me when you are the bread of life?
how can there be any darkness in me when you are the light of the world?
I think I've learned contentment in areas of my life--not wanting a different job, more money, better clothes. I just need to find a resting place in believing I will be approved of when I put my best food forward. that sounds like a belief that would quench thirst.