Once there was no room for a grain of sand in my eyes, what does it mean to allow the whole desert now?

We couldn't tolerate any imperfections before, but now we have been able to accommodate a wider world and become more tolerant. The meaning of this sentence is a metaphor for a narrow-minded person who can only see the small things in front of him and can't take care of the overall situation. Now we are open-minded, able to accommodate the wider world and see the problem more comprehensively. This change in mentality may be due to what we have experienced, or we have seen a wider world, which has given us a deeper understanding and understanding.