The secret art of inviting happiness
The miraculous medicine of all diseases

Just for today, do not anger
Do not worry
and be filled with gratitude
Devote yourself to your work
and be kind to people

Every morning and evening, join your hands in prayer
pray these words to your heart and
chant these words with your mouth

Okay, let's look at these one at a time, shall we?

Just for today, do not anger.
I cannot begin to tell you how many times I have had people shoot back at me, and very quickly I might add, "How are you supposed to not get angry with all the fools and silliness out there, people in traffic cutting me off, people at work doing stupid things..." etc., etc.
Admittedly, this can be much easier said than done. It's not easy letting every, or sometimes any little thing slide.
However, if one were to sit a moment and think about why they are actually getting as angry as they are, and if they thought about the time and energy expended on this anger, they usually sit and start to laugh about the foolishness of it all, then begin to realize how much time they have wasted on all the bad mood and energy.
And usually that leads to getting angry at oneself, something easier to deal with than anger at another.
Don't waste your time and energy getting angry, it hurts no one but you...

Do not worry.
To sum this up as simply as I can, why bother?
What will sitting and worrying about something accomplish? At best, a headache and likely a sore stomach from all the tension built up inside you. And is it really worth it, sitting and worrying about something that you may have some degree of control over (is that it? You desire control over a situation?) that in reality is going to work out the way it's needed to work out, in your favour or otherwise? Or perhaps worrying about something that is, in reality, something that needn't concern or worry you at all... (why DO people get so worked up about sporting events, something they're not even directly involved in? Lots of stress for I'm not sure exactly what...)

and be filled with gratitude
Something that seems to lacking in a major way in this world of ours.
More and more I hear "Well, I have it coming to me, after all, I am as deserving as the next person so where's mine, and why do I have to wait and what I have isn't enough and why can't I have more...."
But never do I hear, "I'm really glad to have what I've got, and if I'm lucky enough to have what I need, and maybe a little extra I'm happy". I'm going to quote a song by Sheryl Crow here, the line is
"It's not having what you want, it's wanting what you've got"
I understand comfort, I understand working for (a little) more,
I don't understand blatant greed or constant grasping, and I don't understand the idea of entitlement.
None of us are any more entitled to anything than another, we all get what we deserve.
And we should be thankful for that, if nothing else.
At very least, be thankful for the fact that you are capable of reading these words, the fact that you woke up this morning and you weren't, well.... dead.

Devote yourself to your work
Do what you do to the best of your ability.
Be proud of yourself and your capabilities, aside from coming up to anyone else's standards, create and come up to your own. No one has a higher set of standards for you than you. Be your own moral compass. It's not up to anyone else in the world to make the decision for you what is right and what is wrong. It comes down to responsibility, oh, sorry.... RESPONSIBILITY for one's own actions.

and be kind to people
Rather simplistic, so I would like to take this a step further, if I may.
How about, "and be kind to all living things". The idea being, aside from the humans we encounter day by day, many of us encounter creatures from all levels, dogs, cats, birds, insects, the living foliage all around us,
Mother Earth herself.
All of it sharing this space with us, all of it part of the wonder of the creation that we all are.
If we extend the kindness to all the creatures around us that we extend to those we know directly and care for, what is stopping us from showing that same level of kindness/compassion to an animal, a tree, a patch of grass,
a lake, stream, pond, river..... you see where I am going here.