The expression "the most elusive things are the most seen" is a confusing explanation that appears to go against itself. However, it could be interpreted as implying that the things we may be most interested in, such as success, love, or happiness, may be challenging to achieve. Despite the fact that we long for these things so much, we are constantly aware of their presence or absence from our lives, making them "the most seen."
Alternately, it could be interpreted as implying that the things we overlook or take for granted, like our health, the beauty of nature, or the support of loved ones, can be the most valuable and significant aspects of our lives. Although these are the most prominent and significant aspects of our lives that we encounter on a daily basis, they may appear elusive due to the fact that we do not always appreciate them or recognize their significance.
Hope this helps, have a nice day!