In creation there are many things which are naturally bad. Out of these bad things, good emerges. When one desires something, the desire is associated with aversion to something else. Man's life is bound up with likes and dislikes, with good and bad thoughts, with union and separation. Hence samsara (worldly life) has been compared to a vast ocean on which the waves are constantly bringing about union and separation. The same ocean contains pearls and gems.
Therefore, we have to face and overcome the trials and tribulations of life...If these difficulties are not there, life will have little
value.
- Divine Discourse, June 1st, 1991.