You may find if you assess the map The thing, as You know, Is of Nepal, and despite its small land coverage (which is just 0.03% of world's total land area), the existence of the strong Himalayas.
For many years, I'd always wished to trek in the Himalaya, but not being so fit and active, I felt slightly shy to proceed. Doubts cross your mind, what if I cannot make it, what if I fail, how hard it is, can I deal with the altitude.