Strength is not tested when things are going at your most optimal conditions. Strength is tested under adversity. Its easy to be 'cool' when you're getting numbers and getting laid. Whats hard is to keep your cool when you're rejected.
If you curious to see how strong you are mentally, wait till you receive a massive rejection and see how you react mentally.
If you curious to see how strong you are mentally, wait till you receive a massive rejection and see how you react mentally.