Maybe your heart sinks as the sun sets.
You look back on your day and can only see how unproductive it was.
You try so hard but nothing seems to be working.
Every where looks blocked and you're almost giving up as it is yet the end of another worthless day.
Well I must remind you that even the sun, as bright as it is, gets cloudy days. On those days the clouds obscure its shine and glory, and it looks as if that day was useless.
Even we humans hate the cloudy days.
But it, the sun, sets, goes to sleep and rises up bright and early, the next day, still shining.
Sometimes the clouds stay for days, but the sun always shines, because it knows that one day the clouds will clear, and it wouldn't want to be caught unawares without its shine.
So as each day sets, don't beat yourself up on what was unachieved, instead tell yourself you'd try again tomorrow, and the day after that, and after that. You keep trying, because one day, the clouds will clear.
As the day sets, rest and gather momentum because tomorrow is another day to shine.