Nothing in the outer reality can bring lasting contentment or happiness. Any person’s life is an example of this. We might achieve or get what we think will satisfy us but after a time it becomes insufficient and the search begins again.
It’s not a matter of what is happening out there, it’s all about our inner state. Our soul has much higher standards than what is found in the material world. Therefor we will never be content with what we can find here.
When we find the wealth of love and happiness within it will be radiated through us to the world. Then automatically how we see and experience the outer reality will change and match our inner state. It’s all within.