"Let he who is without sin cast the first stone",
that's quite a direct and pretty formulation, isn't it?

People who are married fall in love with others and then they are verbally stoned because you are not allowed to cheat on your spouse. And yet it happens every day, all over the world. Are they all bad people now? Indeed, those who think they are all bad people have probably done some of these unacceptable things themselves and secretly accuse themselves, so they can't help but find it unforgivable in others too, about whom they know nothing after all.

And if one were to ask him: Did you cheat on your wife out of revenge, out of malice, for lower reasons, the answer would also be quite possible that he did it out of despair, hopelessness and speechlessness and that he might be forgiven.

If he really did it out of revenge, hatred and arrogance, his own perceived guilt weighs even worse, but who can really admit that he did something out of revenge or arrogance? When everyone around you looks like the purest of angels?

Where a sinner admits his sin, he may already forgive himself for it and he no longer needs the absolution of others.

Instead of taking sides with or against a friend who, for example, surrenders to alcohol, the sinner knows he could also ask the friend "What do you need? What do you think would be wise to do?" And, insofar as the one being asked does not know the answer, preferring to continue drinking, one can let him do so and still remain a friend.

If he cannot, because he is too miserable to see the friend continue to drink, then it is wise to withdraw. Not because the friend should be punished, but because you yourself cannot bear to witness the suffering of another without wanting to force him to do something he does not seem ready to do.

Therefore, you cannot be happy all the time, it is impossible not to feel sadness as well. But both states come and go, don't they? If you think you can stay in constant bliss, fate will come around the corner and teach you otherwise, yes? But of course, you are correct, life can be seen as being about happiness :)

I just used more words than you did ;-)