What is called an intentional thought? I'm a 16 old student and I'm getting weird and intrusive thoughts which are unwanted and unintentional. I got those thoughts about buddha which can be greater insult for Him. But none of them are intended or wanted. Do this collect bad kamma? I've begun to fear those thoughts as I'm someone who fear sinning more than anyone. Please help me, what should I do?
There's no sin in Buddhism. Buddha will not be offended if you're thinking some silly thoughts. Don't hurt yourself with this fear. No need to perpetuate those silly thoughts either, it won't do you any good. Focus on what's beneficial. Such as study of Dharma.
Karma is not watching you, it does not revenge or punish. Karma is the future you build with your choices, day after day after day.