Naruto, Sakura, Choji, Rock Lee, and recently Ino in episode 220 have all felt inadequate after battling various opponents. This caused them to renew their resolve, and begin training hard again. Often times the episodes ends with all the various ninja vowing to not be left behind, and train competitively to become stronger than the other. This is most notable between Naruto and Sasuke.
Let’s see what Paul has to say about competitively training:
“Do you not know that in a race all the runners compete, but only one receives the prize? So run that you may obtain it. Every athlete exercises self-control in all things. They do it to receive a perishable wreath, but we an imperishable. So I do not run aimlessly; I do not box as one beating the air. But I discipline my body and keep it under control, lest after preaching to others I myself should be disqualified.”
– 1 Cor 9:24-27
So compete. And “train yourself for godliness… as it holds promise for the present life and also for the life to come.”