Yesterday was gone, tomorrow unknown. What we live in reality is today, the present very moment. Once the moment slips away, it is gone forever. Therefore, we must seize today, to work what we have to, to enjoy what we can enjoy.
But, happiness is something which we have to seek. Happiness will never come by itself. Furthermore, we cannot depend upon other people for enjoyment. Of course, to enjoy with others is better than to enjoy alone, but, in reality, we will feel difficult to find people to enjoy with us together since everybody has his own life to handle.
What we can do is to enjoy our life alone. It is realistic and practical if we hold the mastery of enjoyment in on own hands.
When we get up in the morning, we may see bright blue sky with shining sun or we may see dark cloud to show us that storm will come soon. Whatever the scene is, we must prepare a feeling to accept it happily, to enjoy the wonder of the weather, showing us that our life is the same, sometime in fair wind, and sometime in dismay.
Happiness is from our heart which can decide in what angle we are to see the world. We may see it ugly or beautifully according to the mood we have today. Do our best to have good mood every day, not bad one.