Hi Aniduan,
I am glad to hear that. I know there could many others who may have a difficult time believing this. The reason for that skepticism is that it is hard for us to “see” the power of the human mind.
But this is the key to understanding Buddha Dhamma. The “proof“ is actually what you said: One can experience the results.
We cannot “see” the radio or television waves emitted by the broadcasting stations. But we know they exist because we can tune to the station we want by tuning to the right frequency. We can stay away from those we don’t want.
Just like that by adjusting our minds, we can tap the “correct Dhamma” (normally called “Dhamma“)and reject the “bad Dhamma” (also called “Adhamma“).
The following Dhammapada verse explains why one can NEVER overcome anger (vera) by anger; it can only be overcome by non-hate or compassion (avera).
“Na hi verena verani
sammantidha kudacanam
averena ca sammanti
esa dhammo sanantano“.
It is easier to see the meaning when we break adjoined terms (“anta” is end; “san” is what we do to extend samsara, i.e., sankhara; “ku” are defilements); see, “What is “San”? Meaning of Sansāra (or Samsāra)“. It is important to see how the sounds may change when two words are combined: it is the natural way the sound comes out:
“Na hi verena verani
san anti (will end or stop) idha ku (defilements) udda (to uproot) ācanam (ācaya means “to accumulate”)
averena ca san anti (anti is come to an end)
esa dhammo san antano (that which stops)”.
Translated:
“Anger cannot be overcome by anger.
Defilement of the mind ends when those ‘ku’ are uprooted
Compassion will lead to the end of “san” (here to stop bad thoughts from arising)
This is the Dhamma (or the way) to end “san” (and thus to attain peace)”.
It is also important to make this “peace of mind” permanent (i.e., remove anusaya or remove “ku” permanently from the mind). That involves comprehending Tilakkhana. That is what is meant by “kammakkhaya” in the post: “Kanha (Dark) and Sukka (Bright) Kamma and Kammakkhaya“.
If anyone has questions on that or the above, we can discuss.