A harvest is not expected in the season for sowing. It would also be deemed irrational to expect to reap when nothing has been sown. Different crops are sown at different times in different regions. Seasons determine what is best sown and harvest times consequently varies with types of crops.
It is no different in human lives, there is a time to speak kindly and a time to be angry. There is a time for working hard and a time to rest. Relaxing at a time when hard work is required may result in having nothing when others are reaping a bountiful harvest from their labours.
To everything there is a season
Doing the right thing at the right time has also kept many from regretable situations. Staying focused at work for instance could prevent one from getting into unhealthy conversations, that could destroy valuable relationships.
Discerning of the seasons in life and engahing in the right thing at the right time is a key to healthy living!