The statement "Don't break about yourself, let others praise you" means that one should not boast or speak highly of themselves but should let others recognize and acknowledge their achievements. This statement emphasizes humility and suggests that it is better to have others recognize your qualities rather than praising yourself.

In relation to the character of the private Quelch, this statement reflects his attitude and behavior. Private Quelch is a character from the novel "Stalky & Co." written by Rudyard Kipling. He is known for his exceptional knowledge and intelligence but lacks humility. Quelch often boasts about his intelligence and tries to show off his knowledge to others. He has a tendency to dominate conversations and correct others, which can be off-putting to those around him.

The statement suggests that Private Quelch could benefit from adopting a more humble approach. Instead of constantly bragging about his abilities, he should let others recognize his intelligence and praise him. By doing so, Quelch would create a more positive impression and gain the respect of his peers. This would also help him build better relationships and foster a more supportive and collaborative environment.

I hope it's helpful❤