This is why a Christian should discipline himself. Remember that Paul admonished Timothy, in II Timothy, that he was going to have to strive according to the rules. If he did not strive according to the rules, then he was not going to be crowned.
How about Paul's own example in I Corinthians 9? He clearly showed that he severely disciplined himself. So severely did he discipline himself that it literally says in the Greek that he gave himself a black eye—like he bruised himself. Paul was hard on himself in order to keep within The Way.
