Hi, I'm a complete noob and I start doing my researches about Bitcoin. The answer to my question is probably so obvious that it appears nobody really talk about it...

Why a Bitcoin node should be validing a transaction honestly ?

I mean, if I understand correctly, there are the miners who create the new blocs and the nodes who verify the transactions. But why should a node be honest ? What's the rewards for that ? Are all the nodes receiving a tiny fraction of the bitcoins which afterwards come to the miner's pocket or something similar ?

Thank you for your attention.