All historical monuments, scientific inventions, development of technology, development of medical science etc. took human being years of time and highly focused efforts to achieve beyond his capacity.
‘Tough’ as word reflects the conditioning of mind. Taking leap at pole vault looks tough but athlete enjoys and crosses the bar in ascending order to win medal at Olympics.
‘Tough’ also reflects fear of failure. At operation table patient fears but surgeon smiles and declares operation as successful because of the fact that doctor has already overcome fear with knowledge and practice and self confidence has been achieved.
Indeed ‘tough’ reflects opportunity for those who will dare to take on firm stand to win over tough in any form.
CAT is also not tough as it is achievable and every year this is proved by aspirants that those with great perseverance and obsession have achieved success.