So let’s say you have ‘lies’ on one end of the scale. And on the other end of that scale, you have ‘truth’.
If you go to one end, you will be hit with pain. If you go to the other end you will be hit with pain. So, to confirm, both ends of the scale cause pain. The further you go, the more it pains you.
But if you go far enough on either side, after you break through, the pain ends. And there is bliss.
So, the obvious choice is to go towards the truth and to live the truth and break through the pain barrier there. Because at least after you break through past the pain, you get to end your journey with the ultimate truth.
If you instead go towards the lies, you will be living through the lies and the pain and more lies up to the biggest lie and the ultimate pain, to end your journey with the ultimate lie (also known as Falsehood).
If you go towards the truth, you will be living through the truth, and the pain and more truth up to the biggest truth and the ultimate pain, to end your journey with the ultimate truth (also known as Reality).
The answer seems to be obvious : Try to live through the truth.
How to start? : Start by telling the truth as much as you can.