Here below is philosophy of "Bhagwat Gita" which states that, whatever, happens in our life, always happens for the Good only. Before that let's see a beautiful story below:
"In old times there was a farmer who had worked his crops for many years. One day his horse ran away. Upon hearing the news, his neighbors came to visit him. “Such bad luck,” they said sympathetically.
“All happens for the Good only,” the farmer replied. On hearing this his neighbors were surprised.
The next morning the horse returned, bringing with it three other wild horses. “How wonderful,” the neighbors exclaimed.
“All happens for the Good only,” replied the old man.
The following day, his son tried to ride one of the untamed horses, was thrown, and broke his leg. The neighbors again came to offer their sympathy on his misfortune.
“All happens for the Good only,” answered the farmer. On hearing this his neighbors were again surprised.
The day after, military officials came to the village to draft young men into the army. Seeing that the son’s leg was broken, they passed him by. The neighbors congratulated the farmer on how well things had turned out.
“All happens for the Good only,” said the farmer."
As per the "Gita Saar" which is the brief essence of the Philosophy of "Bhagwat Gita". It is said that:
"Whatever happened in the past, it happened for the good; Whatever is happening, is happening for the good; Whatever shall happen in the future, shall happen for the good only. Do not weep for the past, do not worry for the future, concentrate on your present life."
"जो हुआ अच्छा हुआ, जो हो रहा है अच्छा हो रहा है, जो होगा अच्छा होगा। जो बीत गया उस के लिए मत रोवो, जो आने वाला है उस की चिंता मत करो, अपने वर्तमान में धयान लगाओ"
We should have faith in ourselves & think that our soul is a spark of the Infinite, all powerful, all pervasive Universal Soul, so it's powers are also limit less. Just have positive traits in your life & you shall feel happy. Have a nature of Forgiveness & it shall remove unnecessary tensions in your life. Showing Gratitude towards others is also a positive aspect in life, which makes one humble & creates an environment of peace & harmony in one's life. So considering this we should have a positive attitude in our life. We should look positive in our times of adversity. We should have faith in God & we should always think that "Sun always shines above the clouds.
Jai Shri Krishna