Although at first he had yielded to temptation, he finally decided to take a zero rather than be dishonest. Mark discovered, even though he initially fell, that God did not let him be tempted beyond what he was able to bear. It also tells us that alongside every temptation God has designed a way out. That's God's second promise to us as our Great Defender against temptation. Although the situation may seem hopeless at the time, there is a way to avoid falling.
Every temptation has an escape hatch.
There is always an alternative action. Many people live in situations where they are constantly being tempted to sin. Oftentimes they seem to be trapped. God is faithful even in those situations. He always provides a way out.