A. A rich man here means a man with a lot of illusions, rather than a man with a lot of knowledge or a lot of wealth. ‘Enter the kingdom of God’ means to attain eternal life in Christianity, or enlightenment in Buddhism. Only people who can see things as they are, may enter the kingdom of God. Seeing things as they are means not being deluded by illusions, which is to be able to see things as empty. In brief, only people who are free from illusions by seeing things as empty can enter the kingdom.
My answer to your question is: ‘They can enter the kingdom of God if they realise how to put Mount Everest into a grain of a mustard seed’. To realise how to put Mount Everest into a grain of a mustard seed means to realise that everything is empty. When everything is empty, Both Mount Everest and a mustard seed are empty. When they are empty, there is no ‘large’ and ‘small’ in them. Then, each of them can enter each other freely.
To conclude, rich people, whether rich with illusions or rich with money and knowledge, can enter the kingdom when they can see everything, including all their possessions, as empty. When everything is empty, a camel and the eye of a needle are also empty just like Mount Everest and a mustard seed are. Then, it will be a piece of cake for the rich to pass through the eye of a needle.
All writing ©Boo Ahm. All images ©Simon Hathaway