Words can help or hinder us, D Abboh.

“It’s damn hard” sits in the brain with a semantic context of struggle, difficulty, blocks, etc.

“Mindfulness is an interesting challenge” show the potential for a growth mindset, for transformation, for change.

“I blow it” means I suck, I fail, I am a failure.

But I like your follow up, which is “I keep trying” and I would add, “The more I practice, the better I get at mindfulness.”

Does this make more sense that what I previously wrote?