To me, nothing is certain so I always think in terms of trying.
I will try to work in a new profession, I will try living in a new country, I will try being in a relationship, I will try to live another day a little better than the last.
The idea is that I know nothing is certain and it is impossible to know what anything will be like, no matter what it is. A job, a place to live, a person to be with, even to get up out of bed each day, how will the day go or will it be my last, is uncertain.
This is the reality of life. We cannot know anything for certain and I know that, so for me, everything every day is just trying and hoping for the best.
The most important thing I try to do every day is to be the best person I can be. I have a simple daily goal, which is that every day I want to make someone smile. Can I succeed in that goal and help anyone today? I can only try my best but I cannot guarantee success. Knowing this removes disappointment as long as it does not also remove hope and putting in my best efforts.
Even if i say things that accept the idea of trying without guaranteed success, this has nothing to do with me being certain about what I want and determination to succeed, but that I am not certain about anything in life because I accept reality. This is the essence of non-attachment.
This is the hard part of becoming emotionally and spiritually free, that you find this idea hard to accept because humans love certainty. They love to know for sure what is going to happen every day of the rest of their lives, at least in some aspects such as finding someone to love and staying in love together for the rest of their lives.
That way of living prevents emotional and spiritual freedom and growth, it creates negative attachment which includes fear of loss.
There is a saying; “The only things that are certain are death and taxes.” It is said like a joke, but it is very true, if you change it a bit to the only thing being certain is your death, then you will never be disappointed.
Disappointment and discouragement grows when what you thought was guaranteed does not happen. Everything between your birth and death is a total unknown. Accepting this will make your life a lot less stressful.
In some teachings they believe in destiny, that your life is all planned out and what is written on your forehead by God when you are born is what will happen. They also profess our freedom of choice. Well, those two beliefs obviously contradict each other, so when there is a contradiction, I choose the one that has the most evidence.
Given that the majority of people will say that they usually make the wrong choices, it seems we have freedom of choice to avoid our destiny. This validates that everything is unknown, even to God because we have the freedom of choice to mess up His Grand Plan.
Actually I am wrong.
There is one other guarantee in life. And that is; By living free of all fixations, accepting that life is constantly changing and everyday brings new surprises, both good and bad, and being willing to adapt instantly to a new situation or changing circumstances, you will find your life to be free and filled with happiness by virtue of having removed disappointment and frustration.