Based on Bhagavad Gita Chapter 04, Text 17
When we encounter sudden adversities, we usually get the question, "Why is Krishna doing this to me?"
Gita wisdom explains that when we hold Krishna responsible for adversities, we become like farmers who hold the rains responsible for the bad quality yield. The bad yield is caused not by the rains but by the farmers through their sowing of bad seeds. Similarly, adversities are caused not by Krishna but by us through the kind of karmic seeds that we sowed in the past, either in this or previous lives.
Taxing our brain to find the specific karmic seed that caused the present reversal is futile. The Bhagavad-gita (04.17) emphasizes that the intricate workings of karma are too complex for the human mind to comprehend. This incomprehensibilitycan arise from several reasons like:
1. Different karmic seeds fructify after different time durations
2. Several karmic seeds may fructify as one event
3. One karmic seed may fructify as a series of events
4. Our memory is volatile and fallible.